b) What is the pH of the above solution ?

0 ⤊

b) What is the pH of the above solution ?

7.25 g of gaseous HCl are dissolved in water to give a final solution of 29.2 mL .

a) What is the molarity of this solution ?

Answer: 6.8102

b) What is the pH of the above solution ?

I just need the answer for b.

2007-04-20 03:53:46 · 2 answers · asked by nicole 1 in Science & Mathematics ➔ Chemistry

2 answers

7.25 g| 1 mol/36.36 g| = .1988 mol

M= mol/L

M=.1988 mol/.0292 L = 6.8102

pH = -log (molarity)

pH = -log (6.8102 mol/L)

pH= -.833

2007-04-20 04:07:39 · answer #1 · answered by clevelandbrownsgirl2007 3 · 0⤊ 0⤋

Just take the negative logarithm of the molarity.
Mind you, a nearly 7M solution is a bit concentrated for this method to be totally valid.

2007-04-20 04:04:48 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋