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.

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.