A Level CHEMISTRY 9701/11/O/N/20 Q10


10 In aqueous solution, sulfuric acid dissociates as shown.
H2SO4 -> HSO4 – + H+ This reaction goes to completion.
HSO4 <-> SO4 2– + H+ This reaction reaches equilibrium with constant Kc.
Analysis of a 2.00mol dm–3 solution of H2SO4 found the HSO4 – concentration to be 1.988 mol dm–3. What is Kc?

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