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How many grams of KOH are in 40.0 g of solution containing 5.40% KOH?

How many grams of KOH are in 40.0 g of solution containing 5.40% KOH?

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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**Question:** How many grams of KOH are in 40.0 g of solution containing 5.40% KOH? **Solution:** To find the mass of KOH in the solution, you can use the percentage concentration formula: \[ \text{Mass of KOH} = \left(\frac{\text{Percentage of KOH}}{100}\right) \times \text{Total mass of solution} \] Given: - Percentage of KOH = 5.40% - Total mass of solution = 40.0 g By substituting the given values into the formula, we get: \[ \text{Mass of KOH} = \left(\frac{5.40}{100}\right) \times 40.0 \, \text{g} \] \[ \text{Mass of KOH} = 0.054 \times 40.0 \, \text{g} \] \[ \text{Mass of KOH} = 2.16 \, \text{g} \] Therefore, there are 2.16 grams of KOH in the solution.
Transcribed Image Text:**Question:** How many grams of KOH are in 40.0 g of solution containing 5.40% KOH? **Solution:** To find the mass of KOH in the solution, you can use the percentage concentration formula: \[ \text{Mass of KOH} = \left(\frac{\text{Percentage of KOH}}{100}\right) \times \text{Total mass of solution} \] Given: - Percentage of KOH = 5.40% - Total mass of solution = 40.0 g By substituting the given values into the formula, we get: \[ \text{Mass of KOH} = \left(\frac{5.40}{100}\right) \times 40.0 \, \text{g} \] \[ \text{Mass of KOH} = 0.054 \times 40.0 \, \text{g} \] \[ \text{Mass of KOH} = 2.16 \, \text{g} \] Therefore, there are 2.16 grams of KOH in the solution.
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