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

0 ⤊

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-).

2007-02-27 04:58:06 · 1 answers · asked by mitch v 1 in Science & Mathematics ➔ Chemistry

I got 26.9 but i am being told its the wrong answer

2007-02-27 11:54:25 · update #1

1 answers

Use the henderson hasselbach equation: pH = pKa + log [A-] / [HA]. You have the pH, you need the pKa for carbonic acid (6.37) and solve the equation to get the answer, which is [A-] / [HA] = 26.92

2007-02-27 10:06:10 · answer #1 · answered by ger 3 · 0⤊ 0⤋