Practice The Ion Product Of Water (k_w) (7.3.1)

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6 sample questions

Question 1.
What is the value of K_w at 25 °C?
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Think about the ionization of water.
Question 2.
What does a pH of 7 indicate about a solution?
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Recap your definitions of acidic and basic.
3Question 3.
What is the K_w of water at 25 °C?
- 1.0 x 10⁻¹⁴
- 1.0 x 10⁻⁷
- 1.0 x 10⁻¹⁰
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Think about the standard values.
4Question 4.
True or False: In an acidic solution, [OH⁻] is greater than [H⁺].
- True
- False
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Recall what defines acidity.
Question 5.
At 40 °C, the K_w of water is found to be 2.5 x 10⁻¹⁴. What are the concentrations of H⁺ and OH⁻ in neutral water at this temperature?
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Use the square root of K_w for equal concentrations.
Question 6.
If a solution has a pH of 3, calculate the concentration of OH⁻.
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First, find [H⁺] and then use K_w.

5 more questions in this section. Enroll free to practise them all.