Calculate the value of the rate constant for each run and calculate the average value. Indicate the units for the rate costant. Given :  Rate of reaction for run 1= 1.08 x10-6 M/s Rate law for Run 1 : 1.08 x10-6 M/s = k[0.00125 M]x[0.0088 M]y                                        Eqn 1 Rate of reaction for run 2= 1.58 x10-6 M/s Rate law for Run 2 : 1.58 x10-6 M/s = k[0.0025 M]x[0.0088 M]y                     Eqn 2 Rate of reaction for run 3 = 1.99 x10-6 M/s Rate law for Run 3 : 1.99 x10-6 M/s = k[0.00125 M]x[0.0176 M]y                             Eqn 3

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Calculate the value of the rate constant for each run and calculate the average value. Indicate the units for the rate costant. Given : 

Rate of reaction for run 1= 1.08 x10-6 M/s

Rate law for Run 1 : 1.08 x10-6 M/s = k[0.00125 M]x[0.0088 M]y                                        Eqn 1

Rate of reaction for run 2= 1.58 x10-6 M/s

Rate law for Run 2 : 1.58 x10-6 M/s = k[0.0025 M]x[0.0088 M]y                     Eqn 2

Rate of reaction for run 3 = 1.99 x10-6 M/s

Rate law for Run 3 : 1.99 x10-6 M/s = k[0.00125 M]x[0.0176 M]y                             Eqn 3

 

---

### Laboratory Report: Reaction Kinetics

#### Mass of potassium iodide used: 
0.12 g

#### Mass of sodium thiosulfate pentahydrate used: 
0.115 g

#### Volume of 30% hydrogen peroxide: 
2 mL

#### Part A: Rate Law

- **Temperature:** Not specified in text

#### Experimental Runs:

|                      | Run #1          | Run #2          | Run #3         |
|----------------------|-----------------|-----------------|----------------|
| **Time until permanent blue color appears** |                  |                  |                 |
| **Rate of reaction** | 1.08 × 10^-5 M/s | 1.58 × 10^-6 M/s | 1.99 × 10^-6 M/s |
| **Rate law**         |                 |                 |                |
| **Rate constant**    |                 |                 |                |
| **Temperature of solution** |       |  |  | 

#### Handwritten Calculations and Notes:

- Calculation of hydrogen peroxide volume:
  \[
  \text{3 = V}_1 (V_1 + V_2) \times 30
  \]
  \[
  \text{3 = V}_1 (20 \times 30)
  \]
  \[
  \text{V}_1 = (3 \times 20) / 30 = 2 \text{mL}
  \]

- Calculation of molar amounts:
  \[
  0.025 \text{ mol/L} \times (50 \text{mL/L}) / (100\text{mL})
  \]
  \[
  = 0.025 \text{ mol/L} \times 0.050 \text{L}
  \]
  \[
  = 0.00125 \text{ mol}
  \]
  \[
  0.00125 \text{ mol} \times 166.9 \frac{\text{g}}{\text{mol}} = 0.2\text{g}
  \]

(Note: Some calculations above might need clarification from the context provided in the lab manual or experimental details).

---

This transcription and explanation should provide a comprehensive overview of the experimental setup and findings for an educational website. Ensure all complex calculations are understood by cross-referencing them with the respective experiment guidelines and chemical principles
Transcribed Image Text:--- ### Laboratory Report: Reaction Kinetics #### Mass of potassium iodide used: 0.12 g #### Mass of sodium thiosulfate pentahydrate used: 0.115 g #### Volume of 30% hydrogen peroxide: 2 mL #### Part A: Rate Law - **Temperature:** Not specified in text #### Experimental Runs: | | Run #1 | Run #2 | Run #3 | |----------------------|-----------------|-----------------|----------------| | **Time until permanent blue color appears** | | | | | **Rate of reaction** | 1.08 × 10^-5 M/s | 1.58 × 10^-6 M/s | 1.99 × 10^-6 M/s | | **Rate law** | | | | | **Rate constant** | | | | | **Temperature of solution** | | | | #### Handwritten Calculations and Notes: - Calculation of hydrogen peroxide volume: \[ \text{3 = V}_1 (V_1 + V_2) \times 30 \] \[ \text{3 = V}_1 (20 \times 30) \] \[ \text{V}_1 = (3 \times 20) / 30 = 2 \text{mL} \] - Calculation of molar amounts: \[ 0.025 \text{ mol/L} \times (50 \text{mL/L}) / (100\text{mL}) \] \[ = 0.025 \text{ mol/L} \times 0.050 \text{L} \] \[ = 0.00125 \text{ mol} \] \[ 0.00125 \text{ mol} \times 166.9 \frac{\text{g}}{\text{mol}} = 0.2\text{g} \] (Note: Some calculations above might need clarification from the context provided in the lab manual or experimental details). --- This transcription and explanation should provide a comprehensive overview of the experimental setup and findings for an educational website. Ensure all complex calculations are understood by cross-referencing them with the respective experiment guidelines and chemical principles
### Reaction Rate Experiment

#### Components and Measurements:

| Components               | Run #1        | Run #2        | Run #3        |
|--------------------------|---------------|---------------|---------------|
| 0.36 M sulfuric acid     | 35 mL         | 35 mL         | 35 mL         |
| Deionized water          | 48 mL         | 43 mL         | 47 mL         |
| 0.025 M potassium iodide | 5 mL          | 10 mL         | 5 mL         |
| 0.0025 M sodium thiosulfate | 10 mL       | 10 mL         | 10 mL         |
| Starch solution          | 1 mL          | 1 mL          | 1 mL          |

#### Procedure:
1. **Mixing the Components**:
    - For Run #1, add the components in the order listed and mix the contents of the flask thoroughly before proceeding to steps 3-5.

2. **Addition of Hydrogen Peroxide**:
    - Pipette 1.0 mL of 3% hydrogen peroxide into the flask and note the time of addition (3% hydrogen peroxide is equivalent to 0.88 M hydrogen peroxide).

3. **Observation**:
    - Swirl the flask continuously and record, to the nearest second, how long it takes for a permanent blue-black color to appear. This time is the duration required for all the thiosulfate to react.

4. **Measurement**:
    - Measure the temperature of the solution.

5. **Repeat the Procedure**:
    - Repeat steps 3 - 5 for Run #2.

6. **Hydrogen Peroxide in Run #3**:
    - Add 2.0 mL of 3% hydrogen peroxide and note the time of addition.

7. **Observation and Timing**:
    - Swirl the flask continuously and record, to the nearest second, how long it takes for a permanent blue-black color to appear. This is the reaction time required for all the thiosulfate to react.

#### Part B: Temperature Effect

1. **Reaction at Different Temperatures**:
    - Repeat the reaction using the same amounts of reactants as for Run #3, but at different temperatures.
    - Use an ice bath to achieve a temperature of 5-10°C
Transcribed Image Text:### Reaction Rate Experiment #### Components and Measurements: | Components | Run #1 | Run #2 | Run #3 | |--------------------------|---------------|---------------|---------------| | 0.36 M sulfuric acid | 35 mL | 35 mL | 35 mL | | Deionized water | 48 mL | 43 mL | 47 mL | | 0.025 M potassium iodide | 5 mL | 10 mL | 5 mL | | 0.0025 M sodium thiosulfate | 10 mL | 10 mL | 10 mL | | Starch solution | 1 mL | 1 mL | 1 mL | #### Procedure: 1. **Mixing the Components**: - For Run #1, add the components in the order listed and mix the contents of the flask thoroughly before proceeding to steps 3-5. 2. **Addition of Hydrogen Peroxide**: - Pipette 1.0 mL of 3% hydrogen peroxide into the flask and note the time of addition (3% hydrogen peroxide is equivalent to 0.88 M hydrogen peroxide). 3. **Observation**: - Swirl the flask continuously and record, to the nearest second, how long it takes for a permanent blue-black color to appear. This time is the duration required for all the thiosulfate to react. 4. **Measurement**: - Measure the temperature of the solution. 5. **Repeat the Procedure**: - Repeat steps 3 - 5 for Run #2. 6. **Hydrogen Peroxide in Run #3**: - Add 2.0 mL of 3% hydrogen peroxide and note the time of addition. 7. **Observation and Timing**: - Swirl the flask continuously and record, to the nearest second, how long it takes for a permanent blue-black color to appear. This is the reaction time required for all the thiosulfate to react. #### Part B: Temperature Effect 1. **Reaction at Different Temperatures**: - Repeat the reaction using the same amounts of reactants as for Run #3, but at different temperatures. - Use an ice bath to achieve a temperature of 5-10°C
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