The Ionic Product of Water (AQA A-Level Chemistry): Quizzes

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The Ionic Product of Water
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What is the expression for the ionic product of water, KwK_w?

Kw=[H+][OH−]K_w = [\text{H}^+][\text{OH}^-]

What is the value of KwK_w at 25°C?

1.00×10−141.00 \times 10^{-14} mol² dm⁻⁶

What are the units of KwK_w?

mol² dm⁻⁶

How does KwK_w change with increasing temperature?

KwK_w increases

In pure water, what is the relationship between [H+][\text{H}^+] and [OH−][\text{OH}^-]?

They are equal

What is the expression for calculating [H+][\text{H}^+] in pure water?

[H+]=Kw[\text{H}^+] = \sqrt{K_w}

Where does the equilibrium lie for water dissociation?

Far to the left

How does the pH of pure water change as temperature increases?

pH decreases slightly

How does a strong base like NaOH dissociate in water?

It fully dissociates

What formula is used to find [H+][\text{H}^+] in a strong base solution?

[H+]=Kw[OH−][\text{H}^+] = \frac{K_w}{[\text{OH}^-]}

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