Question

Decide whether the salts listed below should yield an acidic, basic, neutral or indeterminate pH when dissolved in deionized H20. Give chemical reactions to support your answer. ( NaCl, NaHCO3, NaC2H3O2, NH4C2H3O2 and NH4Cl)

Answer 1

if salt formed from strong acid and strong base pH of that salt is 7

NaOH + HCl ----> NaCl

so NaCl is nuetral

NaHCO3 formed from

week carbonic acid and strong NaOH

H2CO3 (aq) + NaOH (aq) -----> NaHCO3

its pH is basic

NaC2H3O2 formed from

C2H4O2 + NaOH ----> NaC2H3O2

its week acid and strong base combination

so pH = basic.

C2H4O2 + NH3 -------> NH4C2H3O

its week base and week acid we cant find its pH

NH4Cl formed from

NH3 + HCl ----> NH4Cl

week base and stong acid

pH = acidic