A 250.0 mL solution of a strong acid is found to have a pH of 0.54....

Question

Question

A 250.0 mL solution of a strong acid is found to have a pH of 0.54. What is the labeled (initial) concentration of this acid?

science chemistry

Answer 1

Answer #1

pH = 0.54

[H+] = 10^(-pH) = 10^(-0.54) = 0.2884 M

So,

[H+] = [Acid] = 0.2884 M

Total moles = 0.2884 * 0.250 = 0.0721 moles

250 ml contains = 0.0721 moles

So, 1000 ml will contain = 0.0721 * 1000/250 = 0.2884 moles

Hence, strong acid concentration = 0.29 M

Answer 2

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