Interpretation:
The average rate of the reaction needs to be determined as the phenolphthalein concentration decreases from 0.00050 M to 0.00015 M.
Concept introduction:
In a
The average rate of a reaction can be given by the formula,
Average reaction rate
Here,
Answer to Problem 101A
The average rate of the reaction as the phenolphthalein concentration decreases from 0.00050 M to 0.00015 M is
Explanation of Solution
We consider table 16.6 to know the value of concentration of phenolphthalein with time.
Concentration of phenolphthalein (M) | Time (s) |
0.0050 | 0.0 |
0.0040 | 22.3 |
0.0020 | 91.6 |
0.0010 | 160.9 |
0.00050 | 230.3 |
0.00015 | 350.7 |
Given that the phenolphthalein concentration decreases from 0.00050 M to 0.00015 M.
So, the change in concentration is
Using the values in table, we get
The average reaction rate is
Chapter 16 Solutions
Chemistry: Matter and Change
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