산-염기 중화반응. 1가산과 2가산

산-염기 중화반응. 1가산과 2가산

 

 

If 20 mL samples of 0.1 M solutions of the acids below are taken, which acid would require a different volume of 0.1 M sodium hydroxide for complete neutralization?

 

If 20 cm3 samples of 0.1 mol dm-3 solutions of the acids below are taken, which acid would require a different volume of 0.1 mol dm-3 sodium hydroxide for complete neutralization?

 

A. Nitric acid

B. Sulfuric acid

C. Ethanoic acid

D. Hydrochloric acid

 

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황산은 2가산(diprotic acid), 즉 이온화되면 H^+ 이온을 2개 내놓음.

나머지는 모두 1가산(monoprotic acid), 즉 이온화되면 H^+ 이온을 1개 내놓음.

따라서 황산은 2배의 NaOH 부피가 필요합니다.

( 관련 예제 http://ywpop.tistory.com/7530 )

 

H2SO4 is a diprotic acid and will require double the amount of base, compared to the other 3 acids, which are monoprotic acids.

 

A. HNO3(aq) → H^+(aq) + NO3^-(aq)

B. H2SO4(aq) → 2H^+(aq) + SO4^2-(aq)

C. CH3COOH(aq) ⇌ H^+(aq) + CH3COO^-(aq)

D. HCl(aq) → H^+(aq) + Cl^-(aq)

 

 

답: B