Question

Will the species below can frorm a buffer when mixed? Please provide an explanation on why is possible or not to form a buffer.

a. HCl and CH₃COOH

b. H₂CO₃ and NaHCO₃

c. NaOH and NaCl

d. NaCH₃COCOO and CH₃COCOOH

e. NaClO and KClO

Answer 1

answers : buffers

1) b. H2CO3 and NaHCO3

2) d. NaCH3COCOO and CH3COCOOH

explanation:

buffer is the mixture of weak acid and its conjugate base (or salt of strong base)

a. HCl and CH3COOH -----> strong acid + weak acid . it is not buffer

b. H2CO3 and NaHCO3 ------------> weak acid H2CO3   + salt of strong base NaHCO3 . so it is buffer

c. NaOH and NaCl -----------> strong base + strong salt . not buffer

d. NaCH3COCOO and CH3COCOOH ---> weak acid CH3COCOOH + salt of strong base NaCH3COCO2 . it is buffer

e. NaClO and KClO -------------> both are salts so it is not buffer