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Acids, bases and titration — Question 103

Original QCE Vault practice · 1 mark

Q103 · Practice questionComplex familiar1 mark

QUESTION 103

Two weak monoprotic acids are compared at the same temperature. Assume that their measured hydrogen ions come from acid ionisation. Which conclusion is supported by the data?

AcidInitial concentration / mol L⁻¹pH
X0.1003.00
Y0.01003.20
(A)
X is stronger because its pH is lower.
(B)
Strength cannot be compared when concentrations differ.
(C)
X and Y have equal strengths because both are weak.
(D)
Y is stronger because its proportion ionised is greater.
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