# UNAM

if you add 15.ml of a 0.250M HCl solution to 50.0ml of a 0.125 MHCl solution what will be the molarity of the resulting solution

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1. it would be

(.25*.015 + .125*.050)/(.015+.050) = 0.1538M

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2. Thank you Steve our answers are corresponding 100%.

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3. A) Calculate the hydrogen ions (H+) concentration in an aqueous solution with the pH of 12.00.

B) What is the hydroxide ion concentration (OH-) of the above solution?

C) What is its pOH?

D What is the pH of a 0.035M solution of acetic acid (CH3COOH), pKa=4.74.

E) A 1.15M aqeous solution of formic acid (HOOH) has a pH of 1.83. What is the Ka of formic acid?

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