The pH of a bicarbonate-carbonic acid buffer is 7.80?

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The pH of a bicarbonate-carbonic acid buffer is 7.80?

Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).

I am gettong 26.9 but am told i am getting wrong answer

2007-03-01 05:50:17 · 2 answers · asked by mitch v 1 in Science & Mathematics ➔ Chemistry

2 answers

I think you are solving for the ratio of [bicarbonate]/[carbonic acid]. Just take the inverse of your answer to get the ratio asked for in the problem.

2007-03-01 05:59:11 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋

ok this should give you the right answer:

pH is the - log of the H+ concentration
pOH is the -log of the OH- concentration
pH+pOH=14
so to get your ratio
you need antilog(-pH)/antilog(-OH)
that gives you .0251

2007-03-01 06:45:16 · answer #2 · answered by Alex P 2 · 0⤊ 0⤋