Experiment 8- Investigate the effect of surface area on the rate of a chemical reaction

                                                             Experiment 8

AIM: 

To investigate the effect of surface area on the rate of a chemical reaction.
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APPARATUS AND MATERIAL REQUIRED: 

1. Test tubes
2. Graduated cylinder
3. Sodium thiosulfate solution
4. Hydrochloric acid solution
5. Stopwatch
6. Sandpaper

Effects on Temperature

OBJECTIVES:

To determine the rate of the reaction at different surface areas.

PROCEDURE:

1. Label three test tubes 1, 2, and 3.
2. Add 10 mL of sodium thiosulfate solution to each test tube.
3. Sand the sides of the test tubes to different degrees of roughness.
4. Add 1 mL, 2 mL, and 3 mL of hydrochloric acid solution to test tubes 1, 2, and 3, respectively.
5. Start the stopwatch and record the time it takes for the solution in each test tube to turn colorless.
6. Repeat steps 5-7 three times for each test tube.

Rate of Reaction

ANALYSIS:

The results show that the rate of the reaction increases as the surface area of the reactants increases. This is because there are more places for the reactants to collide with each other and react at higher surface areas.

Apparatus

CONCLUSION:

The rate of a chemical reaction is affected by surface area. The greater the surface area of the reactants, the faster the rate of the reaction.

DATA:

Test Tube	Concentration of HCl (M)	Time (s)
1	0.1	100
2	0.2	50
3	0.3	25