lab 11 prelab

lab 11 prelab - 1-ions react in a second? 200 100 50 400 25...

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This question addresses safety issues in the Kinetics experiment. Select the correct response in each blank. The only hazardous chemical listed in this chemical is sodium persulfate . It is listed as an oxidizing agent , which can supply its own oxygen and react violently . In this experiment, it is present as a dilute solution and can be handled safely with other aqueous solutions. The waste in the Kinetics experiment should be saved for next week's experiment. thrown in the trash can. kept in a labelled beaker at the bench, the dumped in the waste container on the side shelf at the end of lab. flushed down the sink with water. For which reaction are we trying to find the rate law? S 2 O 8 2- + 10 H 1+ S 2 O 3 2- + 5 H 2 O I 2 + starch indicator blue-black product S 2 O 3 2- + 5 H 2 O 2 SO 4 2- + 10 H 1+ 2 S 2 O 8 2- + 20 H 1+ S 4 O 6 2- + 10 H 2 O 2 I 1- + S 2 O 8 2- I 2 + 2 SO 4 2- I 2 + 2 S 2 O 3 2- 2 I 1- + S 4 O 6 2- Consider the following reaction: Cl 2 + 2 Br 1- 2 Cl 1- + Br 2 a. If 100 Cl 2 molecules react in a second, how many Br
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Unformatted text preview: 1-ions react in a second? 200 100 50 400 25 b. Compared to the rate at which Br 1-ions react, the rate at which Cl 2 molecules react is one fourth as large half as large the same twice as large four times as large In the method of initial rates that will be used in the experiment, you will measure the time it takes for the first small percentage of the reaction to occur. In our reacting system, this corresponds to the time it takes for the thiosulfate ion (S 2 O 3 2-) to be used up (see background section of experiment for details). For this to work, the amount of thiosulfate anion should be small relative to the amount of persulfate anion. In order to verify this, use the amounts of solution suggested for Run #1 in Data Table A and find: mmol of S 2 O 3 2-.050 mmol mmol of S 2 O 8 2-2.00 mmol molar ratio of S 2 O 3 2-relative to S 2 O 8 2-.025...
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lab 11 prelab - 1-ions react in a second? 200 100 50 400 25...

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