Chemistry Notebook
Name:
Date: 02/1/25
Experiment #: 1
Title: Kinetics
Purpose:
The purpose of this experiment is to study the effects of concentration and temperature on the
speed of a chemical reaction. From this, we will determine the rate of the chemical reaction.
Procedure:
Experiment 1:
S2O32- (aq) + 2H+ (aq) → S(s) + H2SO3 (aq)
1) In a test tube, 10 mL of 0.1 M thiosulfate ion (S2O32-) and 0 mL of water were mixed.
2) In test tube 2, 8 mL of 0.1 M S2O32- and 2 mL of water were mixed.
3) In test tube 3, 6 mL of 0.1 M S2O32- and 4 mL of water were mixed.
4) In test tube 4, 4 mL of 0.1 M S2O32- and 6 mL of water were mixed.
5) In test tube 5, 2 mL of 0.1 M S2O32- and 8 mL of water were mixed.
6) Using the formula C1V1 = C2V2, the concentration of the solutions in each test tube
was calculated and recorded in Table 1.
7) A timer was started and 10 mL of HCl was poured into the first test tube with the 10 mL
S2O32- and 0 mL water mixture in front of a black background. The time was recorded (in
seconds) when the solution turned cloudy/turbid.
8) Step 7 was repeated for test tubes 4 - 5. The times were recorded in Table 2.
9) The relative rate was calculated with the formula, relative rate = 1/sec, and recorded in
Table 2.
Experiment 2:
→
I -
2H2O2 O 2 (g) + 2H2O
1) A gas apparatus is used to measure the volume and contains a flask and a stopper, a
graduated gas burette, and a leveling bulb. A tube is connected to the reaction chamber
and the gas burette, and another tube is connected to the gas burette and the leveling bulb.
2) For the first trial, 5 mL of peroxide and 15 mL of water were poured into flask #1 and
the stopper was put back on. The initial reading of the volume was recorded.
3) 10 mL of Potassium Iodine was poured into the flask and the time was recorded after 2
mL of oxygen was produced and recorded.
4) For the second trial, 10 mL of peroxide and 10 mL of water were poured into flask #2
and the stopper was put back on. The initial reading of the volume was recorded.
5) 10 mL of Potassium Iodine was poured into the second flask and the time was recorded
after 2 mL of oxygen was produced and recorded.
Name:
Date: 02/1/25
Experiment #: 1
Title: Kinetics
Purpose:
The purpose of this experiment is to study the effects of concentration and temperature on the
speed of a chemical reaction. From this, we will determine the rate of the chemical reaction.
Procedure:
Experiment 1:
S2O32- (aq) + 2H+ (aq) → S(s) + H2SO3 (aq)
1) In a test tube, 10 mL of 0.1 M thiosulfate ion (S2O32-) and 0 mL of water were mixed.
2) In test tube 2, 8 mL of 0.1 M S2O32- and 2 mL of water were mixed.
3) In test tube 3, 6 mL of 0.1 M S2O32- and 4 mL of water were mixed.
4) In test tube 4, 4 mL of 0.1 M S2O32- and 6 mL of water were mixed.
5) In test tube 5, 2 mL of 0.1 M S2O32- and 8 mL of water were mixed.
6) Using the formula C1V1 = C2V2, the concentration of the solutions in each test tube
was calculated and recorded in Table 1.
7) A timer was started and 10 mL of HCl was poured into the first test tube with the 10 mL
S2O32- and 0 mL water mixture in front of a black background. The time was recorded (in
seconds) when the solution turned cloudy/turbid.
8) Step 7 was repeated for test tubes 4 - 5. The times were recorded in Table 2.
9) The relative rate was calculated with the formula, relative rate = 1/sec, and recorded in
Table 2.
Experiment 2:
→
I -
2H2O2 O 2 (g) + 2H2O
1) A gas apparatus is used to measure the volume and contains a flask and a stopper, a
graduated gas burette, and a leveling bulb. A tube is connected to the reaction chamber
and the gas burette, and another tube is connected to the gas burette and the leveling bulb.
2) For the first trial, 5 mL of peroxide and 15 mL of water were poured into flask #1 and
the stopper was put back on. The initial reading of the volume was recorded.
3) 10 mL of Potassium Iodine was poured into the flask and the time was recorded after 2
mL of oxygen was produced and recorded.
4) For the second trial, 10 mL of peroxide and 10 mL of water were poured into flask #2
and the stopper was put back on. The initial reading of the volume was recorded.
5) 10 mL of Potassium Iodine was poured into the second flask and the time was recorded
after 2 mL of oxygen was produced and recorded.
