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A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.00 at 25 °C. He will do this in three steps: • Fill a 900.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid potassium hydroxide and add it to the flask. . . Fill the flask to the mark with distilled water. Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits. 08 X 3

A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.00 at 25 °C. He will do this in three steps: • Fill a 900.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid potassium hydroxide and add it to the flask. . . Fill the flask to the mark with distilled water. Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits. 08 X 3

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Preparing a Potassium Hydroxide Solution** A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.00 at 25°C. The preparation will be carried out in three steps: 1. **Fill a Volumetric Flask Halfway:** - Use distilled water to fill a 900.0 mL volumetric flask about halfway. 2. **Weigh and Add Potassium Hydroxide:** - Weigh out a small amount of solid potassium hydroxide and add it to the flask. 3. **Complete the Volume:** - Fill the flask to the mark with distilled water to achieve the desired volume. **Calculation Task:** Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step. Ensure to round your answer to 2 significant digits. **Interactive Component:** An input box is provided for entering the calculated mass in grams. **Explanation Button:** An option to check your answer or review the explanation is available for educational support. **Note:** This task includes understanding the relationship between pH, solution concentration, and the quantity of solute required.
Transcribed Image Text:**Preparing a Potassium Hydroxide Solution** A chemist must prepare 900.0 mL of potassium hydroxide solution with a pH of 13.00 at 25°C. The preparation will be carried out in three steps: 1. **Fill a Volumetric Flask Halfway:** - Use distilled water to fill a 900.0 mL volumetric flask about halfway. 2. **Weigh and Add Potassium Hydroxide:** - Weigh out a small amount of solid potassium hydroxide and add it to the flask. 3. **Complete the Volume:** - Fill the flask to the mark with distilled water to achieve the desired volume. **Calculation Task:** Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step. Ensure to round your answer to 2 significant digits. **Interactive Component:** An input box is provided for entering the calculated mass in grams. **Explanation Button:** An option to check your answer or review the explanation is available for educational support. **Note:** This task includes understanding the relationship between pH, solution concentration, and the quantity of solute required.
Expert Solution
Step 1: Determine the data given

The volume of the potassium hydroxide solution = 900.0 mL

The pH of the potassium hydroxide solution at 25 degree straight C space equals space 13.00

We have to calculate the mass of potassium hydroxide that the chemist must weigh out in the second step.

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