Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions

In: Science

Submitted By AaronEmmanuel
Words 1146
Pages 5
Title: To investigate the trajectory of a small ball as it rolls off a surface which is inclined to the horizontal.

Objectives: To investigate the trajectory of a two dimensional motion.

Apparatus and materials: Ramp, wooden block, pendulum bob, plumb line, steel ball, wooden board, carbon paper, meter ruler, plasticine.

Setup: 1. A ramp was set up at the edge of a bench.

2. A plum-line is suspended from the edge of the bench.
3. A wooden board is mounted horizontally using two clamps so that the board is situated
about the bottom of the ramp.

4. A sheet of blank paper is placed on top of the board.

5. A piece of carbon paper is placed on the top of the blank paper. The ink-side of the
carbon paper is facing down.

6. When a ball was released from the top of the ramp, the ball travelled through a
trajectory.

Theory:
Let:
g= 9.80ms-2
u= speed of the ball as it leaves the ramp
k= constant
y= vertical distance (between the bottom of the ramp and the top of the board)
x= horizontal distance (between the plum-line and mark on the paper)

The equation which relates x and y is


yx=g1+k2x2u2+k



Procedure :
1. The ball was positioned at the top of the ramp. The ball was released so that it rolls down the ramp and onto the board below.

2. The carbon paper was removed and observation was done that the ball makes a small mark on the blank paper.

3. The vertical distance y and the horizontal distance x was measured and recorded.

4. The value of y was reduced and the steps above was repeated to obtain seven (7) sets of values x and y.

5. y, x, and y/x was tabulated.

6. A…...

Similar Documents

Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions

...Title : Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions Objective : To investigate the action of saliva and 3 hydrochloric acid in two carbohydrate solution Results Table1: Observation Conclusion Solution A Benedict’s test: Blue coloration turned to brick red precipitate. Reducing sugar is present in the solution A. Iodine test: The coloration remained unchanged. Starch is absent in solution A. Solution B Benedict’s test: The blue coloration remained unchanged. Reducing sugar is absent in solution B. Iodine test: The coloration turn into dark blue coloration. Starch is present in solution B. Table 2: Tube Contents Temperature(°C) Benedict's Test-Colour Observation After min 5th min (from tubes 1 - 4 into 1' - 4') After 35th min (from tubes 1 - 4 into 1' - 4') 1 10 ml solution B 1 ml saliva 37 Blue coloration turned into translucent green. Blue coloration turned to green and finally moderate amount of brick red precipitate suspended in solution. The solution was opaque. 2 10 ml solution B 3 M HCI 37 The blue coloured solution remains unchanged. The blue coloured solution remains unchanged. 3 10 ml solution B 3 M HCI 95 White coloured translucent suspension formed in moderate amount. A very big amount of white suspension formed which is very opaque. Turned back into translucent and remaining solution was blue which is translucent. 4 10 ml...

Words: 587 - Pages: 3

Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solutions

...CONFIDENTIAL Employee Performance Evaluation Employee's Name _______________________________________Title __________________ Office/Dept. _________________________Date of Evaluation __________________________ PERFORMANCE DEFINITIONS *3 2 1 STEP I COMMENDABLE ACCEPTABLE MARGINAL Performs beyond specified requirements within job description Meets the specified requirements of job description Corrective action and/or release from job may be required EVALUATE THE ELEMENTS OF PERFORMANCE. Evaluate all factors indicated below by checking the appropriate space and commenting where applicable. *3 _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ 2 _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ 1 _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ QUALITY - Performs work thoroughly effectively accurately QUANTITY - Completes the necessary amount of work Is able to prioritize tasks KNOWLEDGE - Is capable in handling all phases and details within job specifications HUMAN RELATIONS - Is willing to work with others Is able to work with others COMMUNICATION SKILLS - Effectively presents written ideas and information to others JUDGEMENT - Is able to make decisions based on sound reasoning JOB DEPENDABILITY - Is honest and reliable in carrying out instructions _____ Observes Personnel Policies _____ Complies with...

Words: 395 - Pages: 2

Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solutions

...1. Advance Room Booking will be held as per the dates below. Same Room Booking – Female and Male Date | 23 - 26 June 2014 (Monday to Thursday) | Time | 8.30 am to 5.30 pm | Venue | Accommodation Office – (ACO) - Einstein Ground Floor | Residents are required to come to ACO to secure their rooms for the following semester during the Advance Room Booking period. Invoice collection will be from 30 June 2014 onwards at ACO. If you fail to do so during this time period your room will not be available for the following semester. If your roommate is graduating and or leaving the Halls of Residence you will need to find a new roommate. Please update ACO as soon as possible with the new roommate’s name. If you are unable to find a new roommate you will be required to fully check out from the room and ACO will reassign you to another room. When a room is totally empty the university is able to conduct preventive maintenance. There is storage space available. Boxes will be provided by ACO and you will need to return them 3 days after you check in. 2. Changing Room Policy Residents who wish to change rooms will only be considered on a ‘Case by Case Basis’ and ‘Subject to Room Availability’. Residents need to book back their same room during the Advance Room Booking period and to drop by ACO to complete an Appeal Form and submit it with a supporting letter from 1 - 2 July 2014. Only fully completed Appeal Forms with valid reasons will be considered. No appeal for change of......

Words: 349 - Pages: 2

Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solutions

... active site cannot bind with any subtrate anymore.Amylase breaking down the starch suspension into maltose and maltose into glucose when HCL was added into solution B .This is because solution B was hydrolyzed and the H+ ions present break down the bond in between molecules of the solution B The HCl will denature (unfold) the amylase (as noted at the bottom of the link you provided), disrupting the shape of its active site, therefore it won't work anymore.  In table 1,2solution is used which is carbohydrate solution A and B.When solution A tested with Benedict”s solution ,it will form brick red precipitate.From this test,it shown that it is reducing sugar.When it tested with iodine solution,the yellowish iodine solution turn to colourless.That is no starch present.When solution B is tested with Benedict”s solution,that is no change.This result shown that it is non-reducing sugar whereas when solution B tested with iodine ,the purpulish black colour of solution turn into blue black.Starch is presented. In table 2,solution b add with salivaat temperature 37.c,the Benedict solution turn from blue to blue green after 5 min of incubation and remain blue green after 35 min of incubation.Also,when solution b add with HCL at the same temperature,the Benedict solution remain blue after 5 min of incubation and 35 min of incubation whereas when it is tested at temperature of 95.c,it remains blue after 5 min of incubation but form red precipitate after 35 min of incubation.The Benedict......

Words: 553 - Pages: 3

Investigate of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solution

... _______________________________________________________________________________________________________________________________________________________________________________________________________________ [2 Marks] Topic sentence 2 Apart from that, the act of disposing plastics into rivers and drains clogs the water ways, which disrupts flow of water. Topic sentence 3 _______________________________________________________________________________________________________________________________________________________________________________________________________________ [2 Marks] 3. Thesis statement: School-based societies can raise funds in several ways. Topic sentence 1 _______________________________________________________________________________________________________________________________________________________________________________________________________________ [2 Marks] Topic sentence 2 _______________________________________________________________________________________________________________________________________________________________________________________________________________ [2 Marks] Topic sentence 3 Lastly, walkathons can be organized, in participants make a contribution of cash as a form of donation. SECTION B: SYNTHEISISING (18 MARKS) Question 1: You want to state your *opinion that the private education sector has contributed directly to the growth of our nation. You find the following two......

Words: 602 - Pages: 3

Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solutions

...Practical 3 Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solutions ____________________________________________________________________________________ Objective: Students are expected to state the objective of this experiment. Apparatus & Equipments: Boiling tubes Metal test tube racks Beaker Graduated plastic dropper Water bath, ~ 37 oC Water bath, ~ 95oC Materials: Carbohydrate solution A Carbohydrate solution B Benedict’s solution 3 M Hydrochloric acid 3 M Sodium hydroxide Procedures: 1. Prepare two boiling tubes containing 1 ml solution A and 1 ml solution B respectively. Add 1 ml Benedict’s solution to each tube. Heat both tubes together in the (~95oC) water bath for two minutes. Record the results in table 1. 2. Add a few drops of fresh solution A and B separately spaced on a white tile. On each solution, add 1-2 drops of iodine solution. Mix with pen cover. Record your observations in the table 1. 3. Pipette 2 ml solution B into each of four boiling tubes. Label the tubes 1, 2, 3 and 4 respectively near mouth of tube. Label your group name. 4. Place tubes 1 and 2 in a water bath of ~37oC. (It doesn’t matter how long you put it in at this stage as no saliva or HCl have been added yet). 5. Salivate into a small beaker till it reaches about 5 ml. 6. Step (6) and (7) is to be done approximately at the same time. Measure out 4 ml of the saliva prepared in step (4) and pipette 2 ml each into...

Words: 898 - Pages: 4

Investigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solution

...UNIVERSITI TUNKU ABDUL RAHMAN CENTRE FOR FOUNDATION STUDIES FOUNDATION IN SCIENCE JAN 2015 FHSB 1224 BIOLOGY II TUTORIAL 2 NERVOUS SYSTEM I Student’s Guide: At university level, the tutor facilitates student learning without spoon-feeding. Therefore, you are expected to: * Read your textbook, attempt the questions before the tutorial * You may enter the class and sign your attendance after showing your tutor that all tutorial questions have been completed; even if you don’t know how to do, write something - you’re not advised to leave answers blank in the finals. * Write answers on board if you wish to receive tutor feedback (no answer, no feedback) * Be independent: consult textbooks or dictionaries on your own first before asking the tutor * All questions are compulsory. 1 mark may reflect 1 answer point. (No half mark is awarded in the finals marks) ------------------------------------------------- 1. Figure 1 shows the structure of the human nervous system. X Y | | Figure 1 | Based on Figure 1, answer the following questions. (a) Identify the structure X and Y. (2 marks) (b) State the anatomical division of the structure X and Y. (1 mark) (c) Describe the organization of human nervous system. (3 marks) 2. Describe the basic pathway of information...

Words: 432 - Pages: 2

Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions

.... Hence, there is a positive error of 0.02 ms-2. There are many ways to improve this experiment. One of them is by taking repeated readings. This would help determine the correct reading of the experiment. Next, is to avoid parallax error. Be sure that the eye contact of the observer is directly proportional to scale of the measuring instrument. This would help avoid parallax error. Another way of improving the experiment is by using different instruments to make the measurement. This would give a more precise value of the reading hence reducing the errors due to measuring instruments. Projectile is applicable in daily life. An example of projectile motion applied in daily life is playing golf. When a golf ball is hit by a golf club the movement of the golf ball is due to projectile motion. Another example of application of projectile motion in our daily life is playing basketball. When a basketball player shoots the ball towards the net, the movement of the ball is parabolic, thus involving projectile motion. Projectile motion is also involved in the sports of short put. Projectile motion is also applied when fishing. When casting a line the technique for the angler to quickly flick the rod from behind toward the water involves projectile motion as well. Conclusion: This experiment was carried out to investigate the trajectory of a two dimensional motion by investigating the trajectory of a small ball as it rolls off a surface inclined to the horizontal. This experiment......

Words: 1146 - Pages: 5

Investigation of Action of Saliva and 3m Hydrochloric Acid in Two Carbohydrate Solution

... chloroform. The funnel, which is in the shape of a cone surmounted by a hemisphere, has a stopper at the top Separating funnel   An electronic balance uses electromagnet to balance the weight on the pan. This unit widely used in science laboratory as weighing equipment. Electronic balance Lab manual version 4.0 Foundation in Science 6 UTAR FHSC1114 Physical Chemistry Trimester 1 Topic 2: Precipitation of barium (II) sulphate ________________________________________________________________________ Introduction: Barium (II) nitrate reacts with sulphuric acid to produce barium (II) sulphate as white precipitate which is difficult to dissolve in water. If sulphuric acid is in excess compared to barium (II) nitrate, the entire ion Ba2+ will precipitate as barium (II) sulphate. Therefore, barium (II) nitrate is a limiting reagent and the quantity of precipitate formed is determined by this limiting reagent. The excess acid will then be separated using distilled water. Apparatus and Equipments: Pipette (10mL) Hot water bath Beaker (100mL) Filter funnel Glass rod Filter paper Watch glass Electronic balance Materials: 0.1 M Barium (II) nitrate solution, Ba(NO3)2 0.5 M Sulphuric acid, H2SO4 Procedures: 1. Pipette 10mL of Ba(NO3)2 into a 100mL beaker. 2. Add 10mL of diluted H2SO4 and stir with a glass rod. Allow the precipitate to settle. 3. Weigh a clean and dry watch glass with a filter paper. Then, put the filter paper into...

Words: 2220 - Pages: 9

Action of Saliva and Hcl in Carbohydrate Solutions

... | Treasurer | Quah Keng Teng | CLHS | Advisory Committee | Por Wee Chiat | CLHS | First Aid | Matthew Law Khang Thern | CLHS | Prizes & Souvenirs | Nathanael Kho Ren Zhe | CLHS | Part 3 Budget | Debit (RM) | | Credit (RM) | Club Subsidies | 50 | Drinking Water | 20 | | | 100 PLUS | 15 | | | Prizes & Souvenirs | 15 | | 50 | | 50 | PART 4 Schools Invited The students from other school are also invited to participate in the Captain Ball game event. The schools that are invited and will be attending are as below: 1. CHUNG LING HIGH SCHOOL (HOST) 2. PENANG CHINESE GIRLS’ HIGH SCHOOL 3. CONVENT GREEN LANE 4. CONVENT DATO’ KERAMAT 5. SMK HAMID KHAN 6. METHODIST BOYS SCHOOL 7. METHODIST GIRLS SCHOOL 8. SAINTS XAVIER 9. CONVENT LIGHT STREET 10. PENANG FREE SCHOOL PART 5 Objectives The event is organized so that students can have fellowship with the Christians from other school. 3.1 The objectives of holding this project are to: * Develop a spirit of unity and cooperation with all those club members. * To strengthen the communication with others. * To strengthen the bond among Christian and with God. PART 6 Rules & Regulations Teams are usually consisting of six players or more. Each team selects one team member to be the "goal catcher" and two others as shooters. The rest are fielders. Fielders may take position they like......

Words: 610 - Pages: 3

Identification of Unknown Carbohydrate Solution and Investigation of Action of Saliva and Hydrochloric Acid in Carbohydrate Solution at Two Different Temperatures

... confirm your results. 3. After carrying out Benedict’s test, a student concludes that the obtained positive results prove that glucose is present. True or false? Provide a reason. 4. After carrying out Benedict’s test, a student identifies the coloured precipitate as reducing sugar. True or false? Provide a reason. 5. A student pours Benedict’s solution into a tube containing a carbohydrate. No colour change is obtained. The student concludes that the carbohydrate is not a reducing sugar. True or false? Provide a reason. 6. A student adds acid to a solution of sucrose followed by neutralization and, finally, Benedict’s test. A negative (instead of positive) result is obtained. Explain why. 7. Why does sucrose yield positive results after carrying out the non-reducing sugar test? What are the components of sucrose? Lab manual version 6_201505 FHSB1214 Biology I & FHSC1214 Fundamentals of Cell Biology 19 Practical 2 (FHSB 1214 Biology I & FHSC 1214 Cell Biology) Identification of Unknown Carbohydrate Solution and Investigation of Action of Saliva and Hydrochloric Acid in Carbohydrate Solution at Two Different Temperatures ______________________________________________________________________ Objective: Students are expected to state the objective of this experiment. Introductory instructions:  You may perform this experiment in groups of 2-3. Apparatus & Equipments: Boiling tubes Water bath, ~37-40oC Beaker Wooden holder Materials...

Words: 22060 - Pages: 89

Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions

...Centre for Foundation Studies, UTAR 1 2 Chapter Scopes • Endothermic & Exothermic reactions • Enthalpy changes: ∆H of formation, combustion, hydration, neutralization, atomization. CHAPTER 5 Chemical Energetic / Thermochemistry • Lattice energy, electron affinity • Heat of fusion and vaporization • Hess’ Law • Born-Haber cycles • Calorimetry © 2006 Brooks/Cole - Thomson © 2006 Brooks/Cole - Thomson 3 Energy & Chemistry 4 Thermochemistry • Thermochemistry is the study of heat (energy) change/transfer in a chemical reaction. • ENERGY is the capacity to do work or transfer heat. • HEAT is the transfer of thermal energy between two objects because of their difference in temperature. Heat energy is associated with molecular motions. Other forms of energy light electrical kinetic and potential Heat transfers until thermal equilibrium is established. ∆T measures energy transferred. © 2006 Brooks/Cole - Thomson © 2006 Brooks/Cole - Thomson System and Surroundings 5 System and Surroundings 6 Vacuum jacket • SYSTEM – The object under study • SURROUNDINGS – Everything outside the system © 2006 Brooks/Cole - Thomson FHSC1114 Physical Chemistry open Exchange: mass & energy closed energy isolated nothing © 2006 Brooks/Cole - Thomson 1 Centre for Foundation Studies, UTAR Directionality of Heat Transfer 7 Directionality of Heat Transfer • Heat always...

Words: 2559 - Pages: 11

Investigation of Action of Saliva and Hydrochloric Acid in Carbohydrate Solution

... attraction takes place in pure metals. Metallic bonding, the attractive forces between electrons and nuclei in metals, occurs in metals such as Cu and Fe and will be discussed in more detail in Chapter 9. Finally, there are forces that exist between molecules, called intermolecular forces, which will be discussed in more detail in Chapter XX. Table 8.1 Types of Chemical Bonding Type of Interaction Source of Attractive Forces Ionic Bonding Oppositely charged ions Covalent Bonding Nuclei and valence electrons Metallic Bonding Nuclei and electrons Intermolecular Forces Partial charges on individual, separate molecules 8.2 Covalent Bonding Basics OWL Opening Exploration 8.2 A covalent bond is characterized by the sharing of valence electrons by two adjacent atoms. This happens most often between nonmetal elements such as carbon, hydrogen, oxygen and nitrogen. For example, consider a simple covalently bonded molecule, H2. When two isolated H atoms are at a great distance from one another, they feel no attractive or repulsive forces. However, as the atoms approach more closely, the attractive and repulsive forces between the two atoms become important. Chapter Goals Revisited • Understand forces involved in covalent bonding. Identify attractive and repulsive forces between atoms. Chapter 8 Covalent Bonding and Molecular Structure 8-3 H represents valence electron represents nucleus There are two types of repulsive forces between the two atoms. First, the nuclei......

Words: 8991 - Pages: 36

Invetigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solution

...UNIVERSITI TUNKU ABDUL RAHMAN CENTRE FOR FOUNDATION STUDIES FOUNDATION IN SCIENCE JAN 2016 FHSB 1214 BIOLOGY I TUTORIAL 1 BASIC MOLECULES OF CELLS I Instructor’s Guide: 1. Standard answers are not encouraged. Discuss with the students and lead them to the correct answer. 2. Allow and push the students to express and explain the answers, at the same time, correct their mistakes or concepts. 3. If the tutorial questions are not yet covered in the lecture, it should be carried forward to the next tutorial. __________________________________________________________________________________ (Source : Final Examination, Apr 2015) Q1. (a) Figure 1 shows structures of some functional groups present in biological molecules Figure 1 Based on Figure 1, answer the following questions. (i) Identify the functional groups represented by C, D and E respectively. (3 marks) (ii) Given two carbohydrates molecules I and II, where by carbohydrate I contains chemical group A and carbohydrate II contains chemical group B, state ONE (1) possible carbohydrate for each carbohydrate molecule I and II. (2 marks) (iii) Briefly explain how functional groups may affect the functions of biological molecules. (2 marks) (Source: Final examination, Sept 2013) Q2. (a) Figure 2.1 shows the molecular structure of lactose (a disaccharide). Figure 2.1...

Words: 548 - Pages: 3

Investigation of Action of Saliva and 3 M Hydrochloric Acid in Two Carbohydrate Solutions

...Enzymes are biological catalysts that carry out thousands of chemical reactions that occur in living cells. Most of them are proteins. They speed up metabolic reactions in the body but remain chemically unchanged themselves In the experiment, the enzyme amylase was involved.this enzyme takes part in the digestion ofcarbohydrate. digestion is the break down of large complex and insoluble food into small simple soluble molecules for the body to absorb it. starch is a complex, the body have to find a way to break down starch, so the body produces salivary amylase in the mouth to begin the break down of starch into maltose. As the temperature rises, reacting molecules have more and more kinetic energy. This increases the chances of a successful collision and so the rate increases. There is a certain temperature at which an enzyme's catalytic activity is at its greatest . This optimal temperature is usually around human body temperature (37.5 oC) for the enzymes in human cells. Above this temperature the enzyme structure begins to break down (denature) since at higher temperatures intra- and intermolecular bonds are broken as the enzyme molecules gain even more kinetic energy.Also Enzymes have an active site. This is part of the molecule that has just the right shape and functional groups to bind to one of the reacting molecules. The reacting molecule that binds to the enzyme is called the substrate.At high temperature,the active site is said to be......

Words: 335 - Pages: 2