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?
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
Section: Chapter Questions
Problem 1P
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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?

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.

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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