Consider the reactions below: 1. HBr (aq) + H2O (l) H3O+ (aq) + Br- (aq) 2. HCl

Question

Consider the reactions below:

1. HBr (aq) + H2O (l) H3O+ (aq) + Br- (aq)

2. HCl (g) H+ (g) + Cl- (g)

3. H- (aq) + H2O (l) H2 (g) + OH- (aq)

4. Mg(OH)2 (aq) Mg2+ (aq) + 2OH- (aq)

5. OCl- (aq) + H2O (l) HOCl (aq) + OH- (aq)

1. Which of these species are Arrhenius acids?

H2O

HCl

OCl-

Mg(OH)2

H-

HBr

2. Which of these species are Arrhenius bases?

OCl-

HBr

HCl

Mg(OH)2

H-

H2O

3. Which of these species are Lowry Bronsted acids?

H2O in reactions 3 and 5

Mg(OH)2

HBr

H-

HCl

OCl-

4. Which of these species are Lowry Bronsted bases?

H-

OCl-

HBr

Mg(OH)2

HCl

H2O in reaction 1

Explanation / Answer

Arrhenius acids are forming H+ in its solution.

1) Arrhenius acids are: H2O, HCl, HBr

Arrhenius bases are forming OH- in its solution

2) Arrhenius bases are: Mg(OH)2

Lowry Bronsted acids are producing H+ in solution

3) Lowry Bronsted acids are: H2O in reactions 3 and 5; HBr, HCl

Lowry Bronsted bases are proton acceptors

4) Lowry Bronsted bases are: H-, Cl- and H2O

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