Question

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.

acidic basic neutral: sodium sulfate (Na₂SO₄)
acidic basic neutral: sodium hydrogen arsenate (Na₂HAsO₄)
acidic basic neutral: ammonium sulfite ((NH₄)₂SO₃)
acidic basic neutral: sodium chloride (NaCl)
acidic basic neutral: ammonium chloride (NH₄Cl)

Answer 1

sodium sulfate (Na₂SO₄)    - neutral
sodium hydrogen arsenate (Na₂HAsO₄)   - basic
ammonium sulfite ((NH₄)₂SO₃)    - basic
sodium chloride (NaCl)    -   neutral
ammonium chloride (NH₄Cl)    - acidic

Explanation :

Na2SO4 and NaCl are the salts of strong base and strong acid. so this is neutral

NH4Cl is the salt of weak base and strong acid . so this is acidic

(Na₂HAsO₄) is the salt of strong base and weak acid. so this is basic