Chemistry 122 d

Question

Identify whether each substance is an acid or base:

HCIO2

NH3

NO2

NaOH

H3PO4

NH4+ (i.e, HNH3)

Answer 1

HCIO₂ = acid since it can donate a proton (H⁺). HClO₂ => H⁺ + ClO₂^-

NH₃ = base since it can accept a proton . NH₃ + H⁺ ==> NH₄⁺

NO₂ = acid since it forms HNO₃ or HNO₂ in water (NO₂^- is a base however)

NaOH = base since it increases concentration of OH-

H₃PO₄ = acid since it donates protons

NH₄⁺ (i.e, HNH3) = NH₄⁺ is an acid as it can donate a proton. NH3 is a base (see above)