Which of the following combinations cannot produce a buffer solution? select all that apply.

hf and naf
hocl and nacl
hcn and licn
hclo4 and naclo4
hno2 and kno2
h2so4 and na2so4
nh4cl and naoh
nh3 and (nh4)2so4

- HOCl and NaCl.

- NH4Cl and NaOH.

Explanation:

Hello,

Considering that a buffered solution may contain a weak acid and its salt or a weak base and its salt, the following combinations can not produce a buffer:

- HOCl and NaCl because the salt should be NaClO (sodium hypochlorite).

- NH4Cl and NaOH because the base should be NH4OH (ammonium hydroxide) or the salt NaCl (sodium chloride).

Best regards.

yes the answer is total mass in unchanged   : )