Question

A) A buffer solution contains 0.255 M hypochlorous acid and 0.394 M potassium hypochlorite.  

If 0.0590 moles of perchloric acid are added to 250. mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume change does not change upon adding perchloric acid)

pH =

B)

A buffer solution contains 0.462 M ammonium bromide and 0.311 M ammonia.  

If 0.0351 moles of potassium hydroxide are added to 225 mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume change does not change upon adding potassium hydroxide)

pH =

C)

A buffer solution contains 0.312 M NaH₂PO₄ and 0.445 M Na₂HPO₄.  

If 0.0355 moles of perchloric acid are added to 250 mL of this buffer, what is the pH of the resulting solution ?  
(Assume that the volume change does not change upon adding perchloric acid)

pH =

Answer 1