Chemistry assignment

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Summative assignment questions

The molarity of an aqueous solution of Ba(OH)2 is 0.0024 M.
(a) What is the concentration of H3O+ in this solution?
(b) What is the pH of the solution?
(c) What is the OH concentration in the solution?

 

 

Carbonic acid, H2CO3 is a weak acid. Its first Ka is 4.5 x 10-7. Calculate the Kb of its conjugate base.

 

 

A 0.115 M aqueous solution of an organic monoprotic acid HX has a pH of 3.42. Calculate Kafor HX.

(Type the exponent part of your answer in the second box. For example, for 2.0 x 10–5, you would type 2.0 in the first box and -5 into the second box.)

 

 

 

Hypochlorous acid, HOCl, is a weaker monoprotic acid than acetic acid. In a 0.11 M solution, the pH is 4.24.

Calculate the Ka for hypochlorous acid.

Calculate the pKa for hypochlorous acid.

 

 

If 25 mL of 0.45 M HCl is added to 30 mL of 0.35 M NaOH, what is the pH of the final solution?

 

 

Calculate the pH of a buffer solution containing 0.125 M potassium acetate and 0.100 M acetic acid. (pKa, CH3COOH = 4.74)

 

 

If 0.050 mol of HCl is added to 1.0 L of a buffer solution containing 0.125 M potassium acetate and 0.10 M acetic acid, what is the change in pH of the solution?

 

Last Updated on June 9, 2019 by EssayPro