What is the pH of a 0.00520 M solution of NaOH? 1 4 7 +/- 2 8 12.7 3 6 9 O X x 100 +

Chemistry
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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
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**Question 6 of 12**

**Problem Statement:**

What is the pH of a 0.00520 M solution of NaOH?

**Calculation Interface:**

- A numerical entry section displays the calculated pH as 12.7.
- A keypad with numbers 1-9, 0, and additional buttons for clear (C), backspace (↰), plus/minus (+/-), decimal point (.), and scientific notation (x 10^□).

**Explanation:**

To calculate the pH of a sodium hydroxide solution:

1. **Find the pOH**:
   - NaOH is a strong base that dissociates completely in water.
   - pOH = -log[OH⁻] = -log(0.00520) = 2.28

2. **Convert pOH to pH**:
   - pH + pOH = 14
   - pH = 14 - 2.28 = 11.72

**Final Result:**
The calculated pH should be approximately 11.72 instead of 12.7. Ensure proper calculations are done if adjustments are needed.
Transcribed Image Text:**Question 6 of 12** **Problem Statement:** What is the pH of a 0.00520 M solution of NaOH? **Calculation Interface:** - A numerical entry section displays the calculated pH as 12.7. - A keypad with numbers 1-9, 0, and additional buttons for clear (C), backspace (↰), plus/minus (+/-), decimal point (.), and scientific notation (x 10^□). **Explanation:** To calculate the pH of a sodium hydroxide solution: 1. **Find the pOH**: - NaOH is a strong base that dissociates completely in water. - pOH = -log[OH⁻] = -log(0.00520) = 2.28 2. **Convert pOH to pH**: - pH + pOH = 14 - pH = 14 - 2.28 = 11.72 **Final Result:** The calculated pH should be approximately 11.72 instead of 12.7. Ensure proper calculations are done if adjustments are needed.
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