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Three drops of a 1 0 mol dm-3 solution of HCl w... - JAMB Chemistry 2013 Question

Three drops of a 1.0 mol dm-3 solution of HCl was added to 20 cm3 of a solution of pH6.4. The pH of the resulting solution will be
A
close to that of pure water
B
less than 6.4
C
greater than 6.4
D
unaltered
correct option: b
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