Question

which can act as buffer??
1)NH4OH
2)HCOOH+CH3COONa
3)40 mL 0.1 M NaCN+20 mL of 0.1 M HCI
4)None of them​

Answer 1

Answer:

HCOOH+CH3COONa

Explanation:

a buffer is a solution that can resist pH change the addition of an acidic or basic components. it is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and/or reactions which require specific and stable pH ranges.