DUE DATE 18 SEPTEMBER 2013 QUESTION 1 Assessment Activity : Conduct a practical investigation to determine the effect on the rate of a chemical reaction by one of the factors of temperature, surface area or concentration. Assessment Checklist Learners Name & Surname : Physical Sciences Task : Practical Investigation of Effect on Rate of Reaction by temperature, surface area or concentration Date : Criteria Investigative Question Hypothesis Variables Correctly Identified Table of Results Graph
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to prepare a Grignard reagent, phenyl magnesium bromide, which we then converted to a carboxylic acid. Procedure & Observations- First we started by setting up our apparatus for Grignard reactions. We started by making sure all glassware was completely dried as a Grignard reaction would not occur if water is present. We used a 100ml round bottom flask for our solution and placed it on a hot plate to control the heating process. We then weighed out 0.4920g of magnesium turnings
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Write the cell reaction and calculate EMF. 4. M(s) + 3 Ag+(aq) --> 3 Ag(s) + M3+(aq) | E = +3.16 V | M+(aq) + e¯ --> M(s) | E = +0.20 V | According to the information above, what is the standard reduction potential for the half-reaction M3+(aq) + 3 e¯ --> M(s)? 5. Half-cell 1: strip of Al(s) in 1.00 M Al(NO3)3(aq) Half-cell 2: strip of Cu(s) in 1.00 M Cu(NO3)2(aq) Half-cell 3: strip of Fe(s) in 1.00 M Fe(NO3)2(aq) Galvanic cell Half-cells Cell reaction Ecello(
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Types of Chemical Reactions The vast number of chemical reactions can be classified in any number of ways. Under one scheme they can be categorized either as oxidation-reduction (electron transfer) reactions or non-oxidation-reduction reactions. Another completely different but common classification scheme recognizes four major reaction types: (1) combination or synthesis reactions (2) decomposition reactions (3) substitution or single replacement reactions (4) metathesis or double
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Catalysts and How They Work How do they work? A common misconception is that catalysts lower the activation energy of a reaction, whereas really, they are using an alternative route of the reaction in order for the bonds of the reactant to be broken with a lower activation energy. The way catalysts situate this ‘alternative route’ is by binding to the reactant molecule and changing the electron configuration so that there is high electron density near the bond that are trying to be broken.
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practically all biochemical reactions. The enzymatic reactions were looked at by the use of two comparable reactions of enzyme invertase and a acidic form of the reaction. The order of the nonacidic enzymatic reaction was zero order due to substrate concentration and due to the fact that the reaction was time dependent. It is also due to having large R2 value at 0.9932 for D run and a smaller R2 value at 0.9902 for C run. The acidic runs had a first order reaction, which had a lower R2 values
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Chapter 7-9 Homework Key, CH341 |1. |Give the major organic product of the reaction of 1-ethylcyclopentene with each of the following reagents. Show |[pic] | | |stereochemistry when appropriate. | | |a. D2 with a Pt catalyst. D’s add |b. H-Br |c. H2O with H2SO4 as a catalyst. |d. Cl2: the Cl’s add trans
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of reaction. I worked with three other people and split different tasks between ourselves. This experiment required a lot of safety measures to be taken. Safety: Goggles were needed for the experiment to avoid contact with eyes as we were using hydrogen peroxide which is corrosive, and hot water. Lab. Coats were a necessity in order to avoid the risk of getting the corrosive and possibly irritating substance on our clothes, which may seep through to the skin and cause an allergic reaction or
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LABORATORY NOTEBOOKS Why do we keep a lab notebook? In the ‘real world’, you will be expected to record what you do and how you do it, with the data clearly identifiable. There are 2 reasons for this: • Any scientific experiment is only considered valid if it can be repeated by someone else using your notebook. • If you develop a new product or process, your notebook becomes a legal document that can be scrutinized in a court of law, especially in cases of
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/* * * Java II PRG 421 * June 20, 2011 * Week 4 Assignment * */ package javaapplication46; //import utilities import java.text.NumberFormat; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; import java.awt.*; public class JavaApplication46 extends JFrame implements ActionListener { //Arrays declared int loanTermsYears[] = {7, 15, 30}; double annualRatesPercentage[] = {5.35, 5.5, 5.75}; public class JTabbedPane
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