Mason Royal
Fabiola Reyes
8-27/31-15
Iodine Clock Reaction
Purpose:
The purpose of this lab was to learn how to speed up and down chemical reactions. Also to just work with chemicals and get the feel of them.
Procedure:
1). Measure the temperature of the water in your large beaker.
2). Make a vitamin C solution by crushing 1000mg vitamin C tablet and dissolving it in 60 mL of water in a small beaker. Stir with a glass stir rod. Label this beaker with blue tape as “vitamin C stock solution”. Measure the temperature of your solution. Rinse off the thermometer after each measurement so you do not contaminate the solution.
3). In a beaker labeled “solution A” combine 5mL of the vitamin C stock solution with 8mL of iodine and 60mL of water. Measure the temperature of this solution.
4). In a new beaker labeled “solution B”, add 60mL of water to 15mL of hydrogen peroxide and ½ tsp of liquid starch solution. Measure the temperature of this solution.
5). Pour solution A into solution B and stir with a glass stir rod to mix them thoroughly. Begin timing as soon as you pour A into B. Keep stirring until a change occurs.
Data Table:
https://docs.google.com/a/hightechhigh.org/spreadsheets/d/1bnUnrwvRWEY-NLtp45v7z3dJZKlA435MA1CRBN2YqLk/edit?usp=sharing
Observations:
Conclusion:
In conclusion, the Iodine Clock Reaction was a success and went very well for my first lab. I look forward to future ones.
Discussion of Theory:
What did your calculations show?
That if you wanted a faster reaction you needed hot water and colder for slower.
Was the purpose of the experiment fulfilled?
The purpose for me was fulfilled on figuring out the reaction speeds.
Did the experiment work?
It 100% did! We didn’t have an error the whole time. The goal was to get between 1:50 - 2:05 and our best time was 2:08 so we did pretty well.
Fabiola Reyes
8-27/31-15
Iodine Clock Reaction
Purpose:
The purpose of this lab was to learn how to speed up and down chemical reactions. Also to just work with chemicals and get the feel of them.
Procedure:
1). Measure the temperature of the water in your large beaker.
2). Make a vitamin C solution by crushing 1000mg vitamin C tablet and dissolving it in 60 mL of water in a small beaker. Stir with a glass stir rod. Label this beaker with blue tape as “vitamin C stock solution”. Measure the temperature of your solution. Rinse off the thermometer after each measurement so you do not contaminate the solution.
3). In a beaker labeled “solution A” combine 5mL of the vitamin C stock solution with 8mL of iodine and 60mL of water. Measure the temperature of this solution.
4). In a new beaker labeled “solution B”, add 60mL of water to 15mL of hydrogen peroxide and ½ tsp of liquid starch solution. Measure the temperature of this solution.
5). Pour solution A into solution B and stir with a glass stir rod to mix them thoroughly. Begin timing as soon as you pour A into B. Keep stirring until a change occurs.
Data Table:
https://docs.google.com/a/hightechhigh.org/spreadsheets/d/1bnUnrwvRWEY-NLtp45v7z3dJZKlA435MA1CRBN2YqLk/edit?usp=sharing
Observations:
- The hotter the water, the faster the reaction happened
- The colder the water, the slower the reaction
- The water turned a solid black color after the reaction
Conclusion:
In conclusion, the Iodine Clock Reaction was a success and went very well for my first lab. I look forward to future ones.
Discussion of Theory:
What did your calculations show?
That if you wanted a faster reaction you needed hot water and colder for slower.
Was the purpose of the experiment fulfilled?
The purpose for me was fulfilled on figuring out the reaction speeds.
Did the experiment work?
It 100% did! We didn’t have an error the whole time. The goal was to get between 1:50 - 2:05 and our best time was 2:08 so we did pretty well.