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Chemical Set 1

Find ways to increase the speed of the

reactions of:

3 CuCl₂ (aq) + 2 Al (s) 2 AlCl₃ (aq) + 3 Cu (s)

Chemical Set 2

Find ways to increase the speed of the

reactions of:

10H₂SO₄ (aq) + 2KIO (aq) 10HSO4 (aq)

+ I2 (s) + K2O (aq) + 5H2O (l)

○ I2 (s) 2I- (aq)

○ I2 (s) + I- (aq) I3- (aq)

○ I3- (aq) + starch I3

+ (aq) + starch complex

(s)

Control Tests

Chemical Set 1

Trial 1: 29:18

Trial 2: 26:59

Average: 28.14 minutes

Chemical Set 2

Trial 1: 00:16

Trial 2: 00:16

Average: 16 seconds

Procedure

Measure and place all

chemicals individually into

graduated cylinders

Combine

chemicals/materials into a

single test tube

Let test tube sit at room

temperature until reaction

is complete.

Temperature

Hypothesis: If the temperature of the

solution is increased, then the reaction

rate will increase.

Temperature: Data

Chemical Set 1

Trial 1: 10:35

Trial 2: 17:10

Average: 13.88 minutes

Chemical Set 2

Equipment Malfunction

Temperature: Data Analysis

Chemical Set 1

Temperature: Data Analysis

Increase in temperature = Increase in

kinetic energy = More frequent collisions

= Higher reaction rate

Surface Area

Hypothesis: If the surface area of the

solution is increased, then the reaction

rate will increase.

Surface Area: Data

Chemical Set 1

Trial 1: 22:09

Trial 2: 14:49

Average: 18.66 minutes

Chemical Set 2

Excluded

Surface Area: Data Analysis

Chemical Set 1

Surface Area: Data Analysis

When the surface area of a reactant is

increased, the amount of that reactant

susceptible to collision with other

molecules increases, thereby increasing

the reaction rate.

Concentration (Molarity)

Hypothesis: If the concentration of a

solution is decreased, the rate of the

reaction will decrease.

(If the concentration of a solution is

increased, the rate of the reaction will

increase)

Concentration: Data

Chemical Set 1

Trial 1: 30:50

Trial 2: 30:03

Average: 30.44 minutes

Chemical Set 2

Trial 1: 00:18

Trial 2: 00:18

Average: 18 seconds

Concentration:

Data Analysis - Chemical Test 1

Concentration (Molarity):

Data Analysis - Chemical Test 2

Concentration: Data Analysis

Lower concentration = Particles collide

less frequently= Slower reaction rate

Higher concentration = Particles collide

more frequently = Slower reaction rate

Stirring

Hypothesis: If the solution is stirred, then

the reaction rate will increase.

Stirring: Data

Chemical Set 1

Incomplete

Chemical Set 2

Trial 1: 15.11 seconds

Stirring: Data Analysis

Chemical Set 2

Error Analysis

Recorded Reaction Times

Lab Malfunctions

Limited Supplies

Conclusion: Our Recommendations for your company

Conditions

Temperature: Hot plate level 10

Surface Area: Cut aluminum into 5 or more

equal sized pieces.

Concentration: Use 0.5 M or more

concentrated CuCl2

Stirring: Stir plate level 6 or higher

Thank you!