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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: charbel on March 18, 2020, 07:42:38 PM

Title: bases
Post by: charbel on March 18, 2020, 07:42:38 PM

A buffered solution contains 0.25 M NH3 (Kb = 1.8 x 10-5) and 0.40 M NH4Cl.
a. Calculate the pH of this solution.
b. Calculate the pH of the solution that results when 0.10 mole of gaseous HCl is added to 1.0 L of the buffered solution from part a.
can someone help me please.

Title: Re: bases
Post by: Borek on March 18, 2020, 08:05:48 PM

You have to show your attempts at solving the problem to receive help, this is a forum policy.

Hint: do you know any equations related to pH of the buffers?

Title: Re: bases
Post by: charbel on March 18, 2020, 08:08:59 PM

i have calculated question a and ot 9.05, i know it is correct. but for question b, i do not know what the equation is gonna be(who will react with who)