A 70% B AS Level Chemistry 60% C 2008 – 2009 50% D 40% E Below U Questions on % Haloalkanes 2.8 32 1. Chloromethane can be prepared by a reaction between methane and chlorine in the presence of ultraviolet radiation. (i) Outline the mechanism for this reaction. ..................................................................................................................................... ..................................................
Free Sodium hydroxide Ammonia Sodium
LAB REPORT 7 – STOICHIOMETRY OF A PRECIPITATION REACTION No credit will be given for this lab report if the Data section is not completely filled out. NOTE: This experiment may take several days to complete. OBJECTIVE 1. Predict the amount of product produced in a precipitation reaction using stoichiometry 2. Accurately measure the reactants and products of the reaction 3. Determine the actual and theoretical yield 4. Calculate percent yield PROCEDURE Please complete
Premium Stoichiometry Yield Filter paper
chemical reaction and relate those reactions to products commonly found in a home environment. Through this experiment someone can macroscopically analyze whether a solution is acidic or base and identify the presence of starches in food. Procedure For each of the combinations of chemicals below put 2 drops of each in their own well in the 96-well plate. Making sure to place only 2 drops of the first chemical then adding only 2 drops of the second chemical the observation of the reaction can be made
Premium Chemistry Chemical reaction Hydrogen
Properties of Chemical Reactions Ms. Whitty‚ Science 10 Fiona Adams‚ November 1st‚ 2012 Introduction Chemical reactions are a part of our daily lives‚ from rusting metal to making bread to leaves changing colour in the fall. A chemical reaction is the process that occurs when two or more substances combine to produce a chemical change. When a chemical reaction takes place‚ the change is indicated by one or more qualitative properties. The colour or odor could change‚ gas could be produced
Premium Chemical reaction Chemistry Sodium
.6Name: Danielle Hall|Date: 10.15.2012| Exp 9: Stoichiometry of a Precipitation Reaction|Lab Section: | Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3(s)= CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =.68 g Step 4: Mass of weighing dish _0.6___g Mass of weighing dish and Na2CO3 __0.72__g Net mass of the Na2CO3 ___0.12_g Step 6: Mass of filter paper
Premium Stoichiometry Solubility Measurement
The Effect of Stimulus Type on Reaction Time Katelin Wagoner Anderson University Abstract Previous studies on reaction time have examined the effects of different kinds of stimuli; this experiment specifically tests reaction time in response to auditory and visual stimuli. The common belief is that an auditory stimulus is faster than visual stimuli. There were 23 participants; 95% were Caucasian‚ with six males and 17 females. This experiment required participants to respond to either an
Premium Psychology Management Behaviorism
Action – Reaction B: All right‚ I’ll say: how are you all this day of your time‚ as you know time to exist? AUD: Good. Great. Perfect. B: We will begin with questions. Q: I have a question. We have had a physicist in history -- I believe it was Sir Isaac Newton -- he said for each action there is an equal and opposite reaction. Is that true in your culture? B: All right‚ understand‚ first of all‚ there will be many ideas and interpretations along that line‚ as you understand
Premium Physics Classical mechanics Universe
Classes of Chemical Reactions Whenever a reaction takes place‚ energy is changed as well when the substances react chemically. Scientists have taken these changes in energy and generalized them. Scientists can take these generalizations and discover more about the nature and tendencies of matter. In this lab‚ the purpose was to perform seven reactions‚ write down their equations‚ and identify the type of reaction. In this lab report‚ several methods of displaying this information will be applied
Premium Chemical reaction Combustion
Ionic Reactions Results B - Do your results agree with your expectations from the solubility rules/table? Our results seemed to largely agree with the established solubility rules/table; however‚ a few reactions with the commonality of being mixed with Co(NO3)2 (cobalt nitrate) [reference Row A‚ Columns 2‚ 3‚ and 4] seemed to have such a pale pink tone that it was difficult to decide whether that could have been a precipitate or the lighting in the area where the experiment took place. Ultimately
Premium Chemistry Chemical reaction Solubility
Bowens Reaction Series Mineral occurrence in igneous rock is most simply explained by Bowen’s reaction series. Norman Levi Bowen discovered the series of reactions while studying the process of crystallizing minerals in Washington‚ D.C. in 1928. In order to best express his findings to his scientific brethren‚ Bowen created a visual display based on when and under what conditions each silicate mineral crystallized. This is extremely important to geologists because it helps them to easily understand
Premium Mineral Granite