12. What is the pH of 0.10M citric acid? Please show steps and explain!

Question

Question

science chemistry

Answer 1

Answer #1

Citric acid is a weak tribasic acid.

Pka₁ = 3.1

PKa₂ = 4.7

PKa₃ = 6.4.

At 0.1 M citric acid , pH is due to pKa₁

Now, for weak acid

pH = ( pKa₁ - logC)

= ( 3.1 - log 0.1)

= ( 3.1 + 1)

= 2.05.

Answer 2

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