Question

Which of the following aqueous solutions are good buffer systems? 

• 0.16 M acetic acid + 0.21 M potassium acetate 

• 0.26 M perchloric acid + 0.19 M sodium perchlorate 

• 0.19 M potassium cyanide + 0.25 M hydrocyanic acid 

• 0.37 M hypochlorous acid + 0.24 M sodium hypochlorite 

• 0.35 M ammonium bromide + 0.34 M ammonia

Which of the following aqueous solutions are good buffer systems? 

• 0.12 M acetic acid + 0.15 M potassium acetate 

• 0.34 M ammonia +0.35 M ammonium bromide 

• 0.10 M barium hydroxide + 0.24 M barium chloride 

• 0.35 M calcium nitrate + 0.27 M calcium chloride 

• 0.26 M nitric acid + 0.17 M potassium nitrate

Answer 1

Ans 1:​​​​​ The good buffer solution are:

a) 0.16 M acetic acid + 0.21 M potassium acetat: acetic

c) 0.19 M potassium cyanide + 0.25 M hydrocyanic acid

d) 0.37 M hypochlorous acid + 0.24 M Sodium hypochlorite

e) 0.35 M ammonia + 0.34 M ammonium bromide

Ans 2: The good buffer solution are:

a) 0.12 M acetic acid + 0.15 M potassium acetat: acetic

b) 0.34 M ammonia + 0.35 M ammonium bromide