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Calculate the ph of a solution formed by mixing 10ml of 0.1M HBr with 20ml of 0.2M HCl.

2007-06-27 10:25:33 · 2 answers · asked by G 1 in Science & Mathematics ➔ Chemistry

2 answers

30 mL with an [H+] of .5/3 M or .167 M

pH = -log [H+] = -log [.167] = .778

2007-06-27 11:09:12 · answer #1 · answered by smilam 5 · 0⤊ 0⤋

They are both strong acids.
Total volume 30ml (= 0.030 litres).

Total acid moles = 10/1000 x 0.1 + 20/1000 x 0.2.

Now divide the total moles by the total volume to get [H+], and then take the negative logarithm in the normal way.

2007-06-27 18:06:03 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋