REACTION RATE EXPERIMENT

A.     Experiment purposes

Observing the factors that affect reaction rate

B.     Overview

Find out the references about the factors that affect reaction rates from chemistry for college textbook and another references, i.e. handbook, website !. References should be taken from two textbook of chemistry for college.

C.     Materials and apparatus

Apparatus	Quantity	Apparatus	Quantity
Test tube	6	Thermometer	1
Stopwatch	1	Analitical balance	1
Sandpaper	1	Dropper pipette	5
Beaker glass 100 mL	6	Aquades bottle	1
Print paper	1	Volumetric pipette	1
Alcohol burner	1	Bulb pipette	1
Wire gauze	1	Measurement cylinder	1
Tripod	1	Watch glass	1

Materials	Quantity	Materials	Quantity
Magnesium ribbon	4 pieces ( ± 2 cm )	Sodium Chloride 0,1 M	proximate
HCl 0,5M; 1 M; 2 M dan 3 M	@ 3 mL	Ferri(III) Chloride 0,1 M	proximate
Hydro Chloride acid 0,1 M	25 mL	Marble lump	4 grams
Na2S2O3 0,1 M	25 mL	Marble powder	4 grams
Hydrogen peroxide	@ 25 mL

D.     Procedures  :

1.      Observing the effect of concentration on reaction rate

·         Prepare 4 test tube and fill it with magnesium ribbon that has been cleaned Give the number 1 - 4

·         Fill the test tube 1 with 0.5 M HCl solution of 3 mL

·         Record the time course of reaction with a stopwatch, starting when HCl solution forth until the Mg tape run out of reaction

·         Repeat these steps for the solution of HCl 1M, 2 M and 3 M in the 3rd test tube the other

2.      Observing the effect of temperature on reaction rate

·         Place the 100 mL beaker on a white paper marked X

·         Fill the beaker with 25 mL Na₂S₂O₃ 0.1 M solution and measure its temperature with a thermometer

·         Pour the 25 mL of 0.1 M HCl solution into a beaker which already contain    0.1 M Na₂S₂O₃ solution

·         Record the time course of reaction with a stopwatch, starting when HCl solution forth until an X is not visible anymore

·         Repeat these steps, with a solution of 0.1 M Na₂S₂O₃ which is heated until the temperature is 40 ^oC, 50 ^oC and 60 ^oC

3.  Observing the influence of surface area on reaction rate

·         weigh chunks of marble weighing 4 grams

·         Fill the beaker with 25 mL of HCl 2 M

·         Enter the 4 gram lump of marble into a beaker containing a solution of HCl have them

·         Record the time course of reaction with a stopwatch, starting when the marble slab marble inserted until exhausted to react

·         Repeat these steps for 4 grams of powdered marble

4.  Observing the influence of catalyst on reaction rate

·         Fill 3 cups with H₂O₂ solution @ 25 mL. Give the number 1-3.

·         Add 20 drops of 0.1 M NaCl solution into beaker number 2

·         Add 20 drops of 0.1 M FeCl₃ solution into beaker number 3

·         Observe the state of the beaker 1-3 at the same time