What is the pH of a 3.3 × 10-4 M CSOH solution?

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
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The image presents a question related to calculating the pH of a solution, accompanied by a basic calculator functionality. 

**Question:**
What is the pH of a 3.3 × 10⁻⁴ M CsOH solution?

**Explanation:**
This question requires the calculation of the pH of a solution where the molarity (M) of cesium hydroxide (CsOH) is given. CsOH is a strong base, which means it dissociates completely in water.

**Calculator Functionality:**
To the right side of the question is a calculator interface that includes:
- A numerical keypad with digits from 0 to 9.
- Operations like addition, subtraction, multiplication, and division are not explicitly shown.
- Specific buttons such as “x” for multiplication, “C” for clear, “+/-” for toggling positive and negative signs, “.” for a decimal point, and “x 10” likely used for scientific notation.

**Calculation Method:**
1. CsOH completely dissociates in water to form Cs⁺ and OH⁻ ions. Hence, [OH⁻] = 3.3 × 10⁻⁴ M.
2. The pOH can be calculated using the formula: pOH = -log [OH⁻].
3. After calculating the pOH, the pH can be found using the relation: pH + pOH = 14.

This information might be particularly useful for educational purposes to explain the step-by-step process of finding the pH of a basic solution using a given molarity and utilizing logarithmic functions.
Transcribed Image Text:The image presents a question related to calculating the pH of a solution, accompanied by a basic calculator functionality. **Question:** What is the pH of a 3.3 × 10⁻⁴ M CsOH solution? **Explanation:** This question requires the calculation of the pH of a solution where the molarity (M) of cesium hydroxide (CsOH) is given. CsOH is a strong base, which means it dissociates completely in water. **Calculator Functionality:** To the right side of the question is a calculator interface that includes: - A numerical keypad with digits from 0 to 9. - Operations like addition, subtraction, multiplication, and division are not explicitly shown. - Specific buttons such as “x” for multiplication, “C” for clear, “+/-” for toggling positive and negative signs, “.” for a decimal point, and “x 10” likely used for scientific notation. **Calculation Method:** 1. CsOH completely dissociates in water to form Cs⁺ and OH⁻ ions. Hence, [OH⁻] = 3.3 × 10⁻⁴ M. 2. The pOH can be calculated using the formula: pOH = -log [OH⁻]. 3. After calculating the pOH, the pH can be found using the relation: pH + pOH = 14. This information might be particularly useful for educational purposes to explain the step-by-step process of finding the pH of a basic solution using a given molarity and utilizing logarithmic functions.
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