Conservation of Mass - In any chemical reaction, the total mass of the reactants is always equal to the mass of the products. Materials: • balance • 1 balloon • weighing paper • 50 mL flask • 50ml graduated cylinder • ~5 g baking soda • ~15 mL vinegar Introduction: The word equation for the following reaction is as follows: vinegar + baking soda → sodium acetate + water + carbon dioxide The chemical equation for the reaction is:
Words: 487 - Pages: 2
Luis Martinez Mr.Kronk Honors Chemistry Bell 1 29 August 2015 Lakota West Lab Purpose The purpose of this lab is to identify physical and chemical changes and differentiate between the two. Procedure Procedure is found on the Physical and Chemical Changes lab at Lakota West lab. Use plastic pipets. On #4 change the experiment to mixing 5 mL of NaCl with 2-3 drops of silver nitrate. On #9 replace regular test tube with a disposable one. Omit the last experiment. Materials Disposable
Words: 589 - Pages: 3
The Diels-Alder Reaction of Anthracene with Maleic Anhydride The Diels-Alder reaction is a member of a class of reactions called cycloadditions. The reaction involves three π bonds, two from the diene and one from the dienophile in a concerted reaction to form a six-membered ring. Since the reaction involves four π electrons in the diene and two π electrons from the dienophile, it is sometimes referred to as a 4 + 2 cycloaddition. Normal Diels-Alder reactions are favored by electron donating
Words: 1797 - Pages: 8
Abstract This act of Toxic Substances Control offers the Environmental Protection Agency (EPA) the ability to control industrial chemicals that are not protected by other statutes. It is know that till this day there are added more than 83,000 such chemicals. Nevertheless, the law is commonly observed as weak and out-of-date, and a number of different stakeholders have called for its reform, quoting the EPA’s failure to control the use of asbestos, throughout extra substances. They analyze the errors
Words: 505 - Pages: 3
bar screens for the removal of objects that could damage or interfere with the process and equipment. Chemical addition Ferrous chloride (FeCl2, an industrial by-product), and lime are added to the sewage before it enters the grit tanks, to improve the subsequent chemical treatment process. Grit removal The effectiveness of the chemicals added in the pre-treatment stage is improved by extra mixing in the grit tanks, and by introducing compressed air
Words: 1246 - Pages: 5
QUESTIONAIRE 1. With increase in temperature viscosity of a liquid a) Increases b) Decreases c) Remains constant d) May increase or decrease depending on liquids 2. Cavitation occurs in a centrifugal pump when a) suction presuure < vapor pressure of liquid at that temperature b) suction presuure > vapor pressure of liquid at that temperature c) suction pressure = vapor pressure d) suction pressure = developed head 3. Centrifugal
Words: 2393 - Pages: 10
Since these insects feed on human and pet foods, they serve as vectors for disease transmission. Chemical insecticides are usually used in many households in order to control these pests. But the high price and health problem from branded chemical insecticides gives dilemma to Filipino household. Respiratory diseases can also result from continuous use of these insecticides especially since chemical substance from the product are inhaled by a person. This study seeks the possibility of using the
Words: 939 - Pages: 4
Enzymes are proteins that act as catalysts to accelerate biochemical reactions. Although many chemical reactions are thermodynamically feasible, they are often not spontaneous and require energy, termed “activation energy”, which is the minimum amount of energy that two molecules must have in order for them to start to react. In the laboratory, activation energy can be applied in the form of heat to increase the kinetic energy of the molecules to initiate the reaction. Clearly, thermal activation
Words: 305 - Pages: 2
CHAPTER 2 2.3) [pic] [pic][pic] [pic] [pic] ( [pic], [pic] At T = 0 K, S = 0 J/K ( the slope of the G versus T curve at T = 0 is zero. [pic] (2.3-1) Where, [pic]. As CP is always positive (i.e. when heat is supplied the temperature of all materials increases), the RHS of equation (2.3-1) is negative. This implies that the curvature of the G versus T curve ([pic]) is negative (convex upwards). [pic] 2.4) Data: [pic] There are N0 sites and N0/2 A atoms and N0/2 B atoms have
Words: 388 - Pages: 2
CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC® CHEMISTRY SYLLABUS Effective for examinations from May–June 2015 CXC 21/G/SYLL 13 Published by the Caribbean Examinations Council. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus
Words: 24316 - Pages: 98
