I need help with my homework this question is very confusing How long would it take for a solution made by diluting 2.5 ml of #1 with 7.5 ml of H2O to react with 10 ml of #2?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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I need help with my homework this question is very confusing How long would it take for a solution made by diluting 2.5 ml of #1 with 7.5 ml of H2O to react with 10 ml of #2?
**Procedure A: Effect of Concentration**

1. Fill each buret on the stand with the solution it is marked for.

2. Deliver exactly 10 ml of solution #1 into a clean, dry test tube from the buret.

3. Deliver exactly 10 ml of solution #2 into a separate clean, dry test tube.

3. Prepare the stopwatch, then mix solutions 1 and 2 by pouring back and forth between the test tubes three times. Begin timing the reaction as soon as you start mixing. Stop timing as soon as a color change occurs. You may need to practice this a few times before proceeding.

4. Repeat the procedure using successive dilutions of solution #1 as per the data chart on the report sheet.

5. Calculate the reaction rate by using 100 divided by the time in seconds.

7. On graph paper, plot a graph of your reaction rates versus concentration. Use the vertical scale or Y-axis to represent the reaction rate, and the horizontal scale or X-axis to represent milliliters of solution #1 (KIO₃).

**Explanation of Graph**

Create a graph with the Y-axis representing the reaction rate and the X-axis showing the volume of solution #1 (potassium iodate, KIO₃) in milliliters. This graph will help visualize how different concentrations affect reaction rates.
Transcribed Image Text:**Procedure A: Effect of Concentration** 1. Fill each buret on the stand with the solution it is marked for. 2. Deliver exactly 10 ml of solution #1 into a clean, dry test tube from the buret. 3. Deliver exactly 10 ml of solution #2 into a separate clean, dry test tube. 3. Prepare the stopwatch, then mix solutions 1 and 2 by pouring back and forth between the test tubes three times. Begin timing the reaction as soon as you start mixing. Stop timing as soon as a color change occurs. You may need to practice this a few times before proceeding. 4. Repeat the procedure using successive dilutions of solution #1 as per the data chart on the report sheet. 5. Calculate the reaction rate by using 100 divided by the time in seconds. 7. On graph paper, plot a graph of your reaction rates versus concentration. Use the vertical scale or Y-axis to represent the reaction rate, and the horizontal scale or X-axis to represent milliliters of solution #1 (KIO₃). **Explanation of Graph** Create a graph with the Y-axis representing the reaction rate and the X-axis showing the volume of solution #1 (potassium iodate, KIO₃) in milliliters. This graph will help visualize how different concentrations affect reaction rates.
**Table of KIO₃ and H₂O Reaction Rates with Starch**

| Trial | KIO₃ + H₂O (Test Tube 1) | Starch (Test Tube 2) | Time (sec) | Rate 100/t (s⁻¹) |
|-------|-------------------------|---------------------|-----------|------------------|
| 1     | 10 ml + 0 ml            | 10 ml               | 18        | 5.5 s⁻¹          |
| 2     | 7 ml + 3 ml             | 10 ml               | 27        | 3.7 s⁻¹          |
| 3     | 5 ml + 5 ml             | 10 ml               | 32        | 3.1 s⁻¹          |
| 4     | 2 ml + 8 ml             | 10 ml               | 68        | 1.5 s⁻¹          |

**Description:**

- **KIO₃ + H₂O (Test Tube 1)**: Mixture of potassium iodate and water in varying proportions.
- **Starch (Test Tube 2)**: Constant 10 ml of starch solution is used in each trial.
- **Time (sec)**: The time taken for the reaction to complete.
- **Rate 100/t (s⁻¹)**: Calculated rate of the reaction, using the formula 100 divided by time in seconds. 

This table displays a series of experimental trials measuring the effect of varying concentrations of KIO₃ and H₂O on the reaction time with starch.
Transcribed Image Text:**Table of KIO₃ and H₂O Reaction Rates with Starch** | Trial | KIO₃ + H₂O (Test Tube 1) | Starch (Test Tube 2) | Time (sec) | Rate 100/t (s⁻¹) | |-------|-------------------------|---------------------|-----------|------------------| | 1 | 10 ml + 0 ml | 10 ml | 18 | 5.5 s⁻¹ | | 2 | 7 ml + 3 ml | 10 ml | 27 | 3.7 s⁻¹ | | 3 | 5 ml + 5 ml | 10 ml | 32 | 3.1 s⁻¹ | | 4 | 2 ml + 8 ml | 10 ml | 68 | 1.5 s⁻¹ | **Description:** - **KIO₃ + H₂O (Test Tube 1)**: Mixture of potassium iodate and water in varying proportions. - **Starch (Test Tube 2)**: Constant 10 ml of starch solution is used in each trial. - **Time (sec)**: The time taken for the reaction to complete. - **Rate 100/t (s⁻¹)**: Calculated rate of the reaction, using the formula 100 divided by time in seconds. This table displays a series of experimental trials measuring the effect of varying concentrations of KIO₃ and H₂O on the reaction time with starch.
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