...Antacid Lab Report Abstract: Inflation is gradually increasing the prices on every human necessity. Unfortunately, the medicine people need to combat distress, disease and sickness are no exception. The purpose of this lab was to make a comparison between two antacid tablets through a titration. The comparison was made between effectiveness and cost, and to make a final verdict on which tablet can neutralise more acid for equal amounts of money. The ground tablets were placed in an Erlenmeyer flask along with a base, a pH indicator, and water. Hydrochloric acid with a pH of two was slowly released into the mixture using a burette. The observable difference that indicated the desired change in pH was a colour variance of the liquid, created by the indicator. The quantity of hydrochloric acid needed to bring the basicity of the mixture to the right pH was noted, and the procedure was repeated with the other antacid. The results showed that the Tums brand could neutralise more acid, however the Equate brand has a lesser cost per gram. A calculation revealed that the Equate brand was the better choice, since overall it could eliminate more hydrochloric acid than the Tums brand per dollar. Key Terms: Chemical reaction: A reaction in which the ionic or molecular structure of a substance is changed to fulfill the substance’s need of a full valence shell of electrons. pH: Scale used to express how acidic or basic a solution is. The scale ranges from 0-14, with 7 being neutral...
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...CHEMISTRY: MATTER AND EQUILIBRIUM Indigestion and Titration: An Acid-Base Titration Imagine yourself as the Lead Analytical Chemist at Kaplan Industries. Your first big assignment is to investigate the strength of several commercial antacids for the Food and Drug Administration (FDA). They have sent five antacids to be tested with a back-titration that works as follows: • • • First, each antacid tablet is mixed with 40 mL of 0.1 M HCl—this acidic solution is the same stuff that is in stomach acid, and one antacid pill is nowhere near enough to neutralize all 40 mL of the acid. So, to see how much extra help each antacid pill needs to neutralize 40 mL of 0.1 M HCL, you add 0.05 M NaOH drop-by-drop to back-titrate the solution until the pH is neutral. What this means is that, the stronger the antacid tablet, the less NaOH it will take to help bring the acid to neutral. (In other words, the stronger antacid tablets counteract more of the original HCl, leaving the solution closer to neutral before the NaOH is added.) Here are your results: Maalox Mass of one dose antacid mL NaOH used in backtitration 20.0 g Tums 21.0 g Mylanta 18.0 g CVS brand 18.3 g Rennies 17.5 g 24.1 mL 22.4 mL 20.0 mL 19.9 mL 24.4 mL 1. Which is the strongest antacid, on a single-dose basis? Which is the weakest? Explain and show your calculations. 2. Which are the strongest and weakest, on a by-weight (mass) basis? 3. When people do back titrations, they usually watch the solution for a color...
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...######## Chm 2046L/ ######## Antacids: Neutralizing Acid Within the Stomach Introduction: Knowing the acidity of a substance or environment can be very crucial to maintaining the safety of everything in the surrounding area. Humans have a strong acid within the stomach known as hydrochloric acid (HCl). HCl is essential as the body uses it to digest the food that comes in. Through this process is how humans can break down all the food eaten to take in the nutrients necessary for survival. The pH balance within the stomach can be disrupted depending on which foods the person chooses to consume. People can also have genetic predispositions to easily upsetting the pH balance within their stomach (Madell, 2012). At an average of a pH 3, the stomach may fall below that level and cause uncomfortable symptoms for which pharmaceutical companies created the antacid. The purpose of antacids is to neutralize stomach acids. An example of such an antacid would be the brands Tums or Alka-Seltzer. There are many other brands that provide acid indigestion relief to customers but there is always one that has a better record at relieving symptoms quicker and stronger. To determine which of four brands neutralizes the drop in pH in the stomach best, a titration technique was used. Phenolphthalein was used as an indicator because of its correlation of color change with pH level. In basic conditions, it is pink and as soon as it becomes acidic it turns clear. The goal was to find...
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...[pic] ANTACIDS PRE LAB DISCUSSION The stomach produces hydrochloric acid to begin the chemical breakdown [digestion] of the food that you eat. Although this acid is quite strong, (about 2 M), the stomach has a thick mucus lining that protects the stomach tissue itself from being digested by the acid. When the stomach is too full or when you have swallowed air, the acid will be forced up out of the stomach into the unprotected esophagus. The acid will react with the unprotected tissue and cause a burning sensation commonly known as "heart burn". There are a number of over-the-counter medications called "antacids". These are not chemical bases. If they were bases and you used them regularly or took them in large doses, they would raise the pH of your blood. This condition, called alkalosis, would result in kidney damage. The brands of antacids sold in the drug store contain insoluble compounds that acids will react with, resulting in the acid being consumed in the reaction. The most common ingredient used is calcium carbonate [CaCO3], also known as limestone. This limestone is ground to a powder, mixed with a starch paste, and formed into a tablet. Often flavoring and coloring is added to make the tablet more attractive. Other tablets contain insoluble hydroxides that will react with hydrochloric acid. There are also newer types of antacids that are taken before eating. These consist of a hormone [chemical messenger] that reduces the...
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...SC155 – Mini-Project #3 Please remember to show all your work for the calculations in questions 1 and 2. These can be added at the end of this document (see Calculations Section). Complete the yellow shaded regions in the document below. Question #1 Antacid Volume NaOH used in back-titration (mL) Volume NaOH used in back-titration (L) Moles NaOH used in back-titration Maalox 24.1 mL 1.205 .001205 Tums 22.4 mL 1.00 .00112 Mylanta 20.0 mL 0.995 .001 CVS 19.9 mL 1.220 .0009995 Rennies 24.4 mL 1.120 .00122 Based on the values you calculated above, which antacid is the strongest / weakest on a single-dose basis? Please explain. Question #2 Antacid Moles base in one dose Mass of one dose Moles/gram for one dose Maalox 24.1 20.0 g .00013975 Tums 22.4 21.0 g .0001371 Mylanta 20.0 18.0 g .0001666 CVS 19.9 18.3 g .0001642 Rennies 24.4 17.5 g .001588 Based on the values you calculated above, which antacid is the strongest / weakest on a by-weight (mass) basis? Please explain. Question #3 What might you have used in the above experiment in order to see a visible color change in the solution? At what pH would the solution have been neutral? Question #4 If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run you tests, how might this have affected your calculations...
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...Title: Comparing the effectiveness of several Antacids Abstract: When using an Antacid, its a medication taken by the mouth. The purpose of this is to slow down the pain with acid indigestion. Antacids work together to neutralize excess stomach acid, which starts during the digestion process. Here are some common Antacids that was used in the lab: Rolaids, Maalox, and Tums. Some don't know that these antacids have at least one of these ingredients: aluminum, Calcium, magnesium, and sodium ( Directly on the back of the products). The aim of this experiment was to evaluate and test the effectiveness of antacids. Hypothesis: All antacid will not be equally effective because they all have different ingredients. Introduction: Within this experiment, the three different antacids was chosen: Maalox, Rolaids, and Tums. To get started we had to crush one antacid and add it to 100 ml of distilled water in a beaker. We did all three antacids separately, but made sure that all three antacids dissolved properly, meaning you don't see some on the bottom of the beaker. By using a stirring rod, stirring can help dissolve the antacids. We had to transfer the three different antacids into three separate test tubes with a pipet adding 5 mL of antacids solution. When we done this we then had to add 4 drops of bromcresol purple to the test tube. Bromcresol purple is a pH indicator. Then we had to add 0.1 M hydrochloric acid to the three test tubes, we had to mix after every drop. this...
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...SC155 – Mini Project #3 Instructor Etheredge **your name here** Please remember to show all your work for the calculations in questions 1 and 2. These can be added at the end of this document (see Calculations Section). Complete the yellow shaded regions in the document below. Question #1 Antacid Volume NaOH used in back-titration (mL) Volume NaOH used in back-titration (L) Moles NaOH used in back-titration Maalox 24.1 mL Tums 22.4 mL Mylanta 20.0 mL CVS 19.9 mL Rennies 24.4 mL Based on the values you calculated above, which antacid is the strongest / weakest on a single-dose basis? Please explain. Question #2 Antacid Moles HCl neutralized by the antacid Mass of one dose Moles/gram for one dose Maalox 20.0 g Tums 21.0 g Mylanta 18.0 g CVS 18.3 g Rennies 17.5 g Based on the values you calculated above, which antacid is the strongest / weakest on a by-weight (mass) basis? Please explain. Question #3 What might you have used in the above experiment in order to see a visible color change in the solution? At what pH would the solution have been neutral? Question #4 If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run you tests, how might this have affected your calculations...
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...Effectiveness of Antacid Tablets by Trisha Dwivdi, 2002 Abstract The purpose of this project was to figure out if antacid tablets are effective in neutralizing the human stomach. Effective was defined to mean that the tablet did not neutralize too much of the solution or too little of the solution compared to other brands. I titrated a solution that had a pH that was similar to the human stomach and tested four brands of popular antacid tablets. The four brands were Pepcid AC®, Zantac 75®, Rolaids®, and Alka Seltzer®. Rolaids® was the only brand that did not neutralize the solution. The other three antacid tablets did work and I decided that antacid tablets are effective in neutralizing the human stomach since they did not neutralize all of the stomach solution or they did not just neutralize a small amount of it. This experiment was all relative to the other tablets, because I had no background information on what defines an antacid tablet to be effective so I had to base it on the results of the other tablets. Rolaids® took an irregular amount of stomach solution compared to the other tablets to neutralize, so I based my results on this observation. Introduction The purpose of doing this project was to figure out if antacid tablets work effectively since there are many tablets out there on the market. I predicted that the antacid tablets will neutralize the stomach solution I made and therefore be effective. I worked in the Breck School Science Lab under...
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...details you provide the better grade you will receive. Evaluations due on Oct. 19th, Sunday before midnight 1) Once the opening quote is established, what are the strategies the author uses to introduce her topic? She finds common ground with her potential audience members and thereby piques their interest. She attempts to establish her credibility by quoting a reputable article in a research publication. She explains the definition of her topic in layman’s terms so as to not seem removed, and distanced from the audience. She addresses the counterargument against fracking by her critics, but maintains her position with economic and interpersonal emotional appeals. 2) How is the introduction of this paper different or similar to the introduction you wrote for the two papers you have completed thus far? She intrigues the audience with her first sentence – the colloquialism, whether intentional or not, evokes a sense of state pride, for those who consider themselves to be Texans. She draws in the audience by expressing her sympathy for their situation – by “identify[ing]”...
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...writing. In fact, the three universities that I have attended in the past have all required me to use the APA style of writing. As I recall my high school years, the APA style of writing also seemed to be a favorite amongst my high school teachers. They all required that term papers be written in APA style as well. This type of writing actually does not differ much from the ones included in the text reading. The text mentioned the APA style of writing several times. In my opinion, it appears to be the most popular style of writing, especially amongst college students. Based on the results of the quizzes, my grammar skills were actually a little better than average. I actually had expected to do better, but I guess my grammar skills are not as good as I thought they were. In any event I feel very confident when it comes to spelling, as I have always been a great speller. Even in grade school, I was a good speller. I learned at a very young age to challenge myself when it comes to spelling. Challenging my-self in that area really paid off as I became older, as I’ve never had a problem with spelling. However, I feel that I need more help with run on sentences and with thought patterns. Though I proof read my paper several times, it’s hard for me to see that I have several run on sentences until after I get my grade back. In general, I feel that my writing is just mediocre. However, I also believe that when it comes to writing, I am my own worst critic. Reason being, I am never...
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...computer and communications equipment (owned by MIS) magnetic media (owned by Manager) power supplies and plant, such as air-conditioning units (owned by MIS) Software assets (owned by MIS) • • • • application software system software development tools utilities Information assets (owned by Manager or MIS) ‘Information’ means information held by the Company on its own behalf and that entrusted to it by others. The following are examples of the media which may contain or comprise information assets. • • • • • • • • • • databases and data files system documentation user manuals training material operational or support procedures continuity plans and fallback arrangements back-up media on-line magnetic media off-line magnetic media paper Services • • computing and communications services (owned by MIS) heating, lighting and power (owned by Manager or Building Services Manager) 1 17/01/03 First•Base Technologies Town Hall Chambers High Street Shoreham-by-Sea West Sussex BN43 5DD UK Tel: +44 (01273 454 525 Fax: +44 (0)1273 454 526 info@firstbase.co.uk Guidance on Information Classification Categories for classifying document security Category 1 : Routine (non-confidential) documents Description: All documents of a routine nature. Effects of disclosure: No measurable damage to the company or a department. Examples: Normal memos, routine reports, circulars. Estimated occurrence of this classification: More than 80% of all documents would be within this class...
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...TO: FROM: SUBJECT: DATE: CC: [CLICK HERE AND TYPE NAME] SAMUEL NEWMAN-BREMANG [CLICK HERE AND TYPE SUBJECT] OCTOBER 22, 2013 [CLICK HERE AND TYPE NAME] C R E A T I N G W A T E R M A R KS I N M I C R O S O F T W O R D [Note: Some steps may vary in Word 97. For additional help, search for “watermark” in the product help or on the Microsoft support site at http://support.microsoft.com.] A watermark is any text or graphic image (such as the “Draft” in the background of this document) that is printed to overlap existing text in a document. A logo printed lightly behind a letter or the word "Confidential" printed lightly on a contract are other examples of watermarks. The rotated “Draft” watermark on this page was created using the Word Art feature. You can insert pictures (such as a logo) from a file or using Clip Art. All three features can be found by clicking on Picture in the Insert menu. To view a watermark as it will appear on the printed page, click Print Layout on the View menu or click Print Preview on the File menu. The watermark will print on every page of this document, just like headers and footers. To edit the watermark or insert a new one, you need to click Header and Footer on the View menu. TO FORMAT A WORDART WATERMARK (LIKE THIS “DRAFT” EXAMPLE): Use the WordArt… command on the Format menu to choose your desired settings for your watermark. There are multiple tabs in that dialog. Use the “Colors and Lines” tab to set the color and transparency. (This “draft”...
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...How to Write a Good Academic Paper? That is a question which most students ask and most of them are new to academic writing. Academic writing if taken as a whole, then it would help you figure its significance and what is more important is, it would help you understand the purpose of it. Any good academic writer’s quality is his/her mind is loaded with creative set of ideas that help him navigate through the whole topic of academic paper. Ideas lead you to somewhere and only a few good students are gifted by nature and if you are not then you can also build up a good rhythm of academic writing. Secondly, you should also have a good sense of your audience; you should know what element of your academic writing would entice them and also create some space for your write-up for reading in their schedule. You then research for resources and data that would be of great use to enlighten your readers. Knowing what you audience wants, should be in your priority because readers enjoy what they seek in your writing. Usually what they look out for is something that could either bring them a smile or get them to think over the subject. Having creative ideas doesn’t guarantee a good and well-researched academic writing. You need to able to figure out ways of putting your research in a proper format so that readers don’t feel deviated from the focal point of your write-up. You should use your sources with proper attentiveness else it would completely ruin your efforts from top to bottom....
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...Hey Jessica, I’m glad your interested in attending the University of Phoenix let me tell you about some of the great resources that are available. First of all they have all kinds of hands on workshops that you can sign up for. They have ones for writing, math, computer skills, exam prep and plenty more. Some other resources are the Center for writing excellence and the Center for mathematics, there are grammar tutorials and plagiarism tutorials and a plagiarism checker as well to help make sure your papers have the proper grammar and the plagiarism checker reviews your paper and tells you how much similarities there is with your paper and other papers so you don’t accidentally plagiarize your paper. Riverpoint writer is a tool to help make sure you are citing your papers properly. In the center for mathematics center they have running start which gives you a review of math concepts to help you brush up on your skills, build math confidence gives you tips to deal with math anxiety it also has study tips, test tips, worksheets and videos. They also have live online math coaching which is only available two weeks before your math class starts through the end of your class. Hope reading about all these resources makes you want to come to the University even more. gotta go talk later. Hello Everyone, I want to review some of the great resources available here at the University of Phoenix. First off I want to go over the workshops that are available to you. There are all...
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...Joe Polce English 015 Mrs. Wickman How To Roll Your Own Cigarette Is anyone in your life a cigarette smoker? Do you often notice that they are always complaining about their ever-rising price? According to the U.S Census Bureau, out of the 6.7 billion people in the world, 2 billion are smokers of cigarettes or some other form of tobacco. Almost 75% of these 2 billion spend between $1000 - $1500 yearly on their favorite packs and cartons that they just cannot resist. We know its a habit, right? Its also an expensive habit. I am going to show you a quick and easy way to not only cut the cost of cigarettes in half, but also save you hundred of dollars. A select few smokers of the modern world have been fortunate enough to find the solution to the climbing prices of cigarettes. This solution is actually very simple. Why don’t we, instead of spending the $6 plus on an already produced pack of Marlboro Lights, make and produce our own pack of very similar cigarettes? Herein lies the solution; roll your own cigarettes. Most people shy away from such an idea claiming that they would never know where to start, or have no idea where they would buy the equipment, but on contrary the first steps to this new lifestyle are very easy, and the tools needed are readily available. The benefits of rolling your own cigarettes are numerous. First off, its inexpensive. GS Hammack, a man who writes for a website called AssociatedContact.com, said that “smokers that are looking for...
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