Acidity or Basicity of Salt Solutions Will 0.10 M aqueous solutions of the follo

Question

Acidity or Basicity of Salt Solutions

Will 0.10 M aqueous solutions of the following salts be acidic , basic or neutral?
(Assume a solution is neutral if its pH is 7.00±0.05).
Equilibrium constants may be found in an appendix to your text.

a) (acidic basic neutral) ammonium sulfide ((NH4)2S)
b) (acidic basic neutral)  sodium acetate (NaC2H3O2)
c) (acidic basic neutral)  ammonium formate (NH4CHO2)
d) (acidic basic neutral)  sodium hydrogen oxalate (NaHC2O4)
e) (acidic basic neutral) sodium chloride (NaCl)

Explanation / Answer

a) (basic) ammonium sulfide ((NH4)2S) this ionizes as:
"NH4+(aq) + S2-(aq) --> HS-(aq) + NH3(aq)
b) (basic) sodium acetate (NaC2H3O2)
This gives: NaOH (strong base) +    CH3COOH (weak acid)
c) (acidic) ammonium formate (NH4CHO2)
This gives: NH4OH (weak base) +   CHCOOH Since the acid ionization of NH4+ is more favored than the base ionization of HCO2-, the solution will be acidic.
d) (basic) sodium hydrogen oxalate (NaHC2O4)
e) (neutral) sodium chloride (NaCl)
As it gives strong acid HCl and strong base NaOH

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.