Question

In aqueous solution, classify these compounds as strong acids, weak acids, strong bases, weak bases, or other.

H2CO3 HNO3 HF CH3COOH LiOH Ba(OH)2 (CH3)3N NH3 HBr NaCl

Answer 1

NaCl is salt of strong acid and strong base

Cl- ion is weak conjugate base of strong acid HCl

Na+ is weak acid

NaCl completely dissociate in water to form Na+ and Cl- ion

increasing order of weak acid

H2CO3<CH3COOH<HF<HNO3<HBr

down the group acidity increase

HBr is the strongest acid

increasing order of base

NH3<(CH3)3N<LiOH<Ba(OH)2

down the group basicity increases

NH3 is weaker than CH3)3N because CH3 has +I effect which increases electron density on N .

more is ability to donate electron pair more is basicity

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