What is the pH of a 0.16 mol/L OH- solution? 1.What is the concentration of an...

What is the pH of a 0.16 mol/L OH- solution?

1.What is the concentration of an aqueous solution of NaOH (a strong base) which has a pH of 10.1?

2.What is the concentration of an aqueous solution of Ca(OH)2 (a strong base) which has a pH of 12.05?

3.Lactic acid is a weak acid with one acidic proton. A 0.10 M solution of this acid has a pH of 2.44. What is the Ka value of this acid?

4.Hydroflouric acid, HF, is a weak acid with one acidic proton. What is the pH of a 0.20 M solution of this acid? (Ka = 6.8 x 10-4 for HF.)

Expert Solution

4. C= 0.20M

Ka = 6.8 x 10-4

for weak acids , [H+] = square root of KaxC

= square root of 6.8 x 10-4 x 0.2

= 1.166 x 10^-2M

[H+] = 1.166 x 10^-2M

-log[H+] = -log[1.166 x 10^-2]

PH = 1.933

PH = 1.93.

queen_honey_blossom answered 2 years ago

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