Question 1
A solution contains hydroxide ions at a concentration of $3.2 \times 10^{-4}$ mol L$^{-1}$ at 298 K. What is the concentration of hydrogen ions in this solution?
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Chemistry · Unit 3 · Chemical equilibrium systems · Chemical equilibrium
Apply Kw to calculate the concentration of hydrogen ions from the concentration of hydroxide ions in a solution.
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Question 2
A cleaning solution at 298 K has a hydroxide ion concentration of $[\text{OH}^{-}] = 2.5 \times 10^{-3}$ mol/L. Using the ionic product of water, calculate the hydrogen ion concentration $[\text{H}^{+}]$ in this solution. Show your working.
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Question 3
A solution contains hydroxide ions at a concentration of $[\text{OH}^{-}] = 2.5 \times 10^{-5}$ mol L$^{-1}$. (a) Write the expression for the ionic product of water, $K_w$. (1 mark) (b) Calculate the concentration of hydrogen ions, $[\text{H}^{+}]$, in this solution at 298 K. (2 marks)
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Question 4
Determine the concentration of hydrogen ions (H⁺) in an aqueous solution containing 4.0 × 10⁻⁴ M hydroxide ions (OH⁻).
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