Question

1. HBrO2(aq) + BrO3-(aq) ↔ BrO2-(aq) + HBrO3(aq) Would you expect the equilibrium to lie to...

1. HBrO2(aq) + BrO3-(aq) ↔ BrO2-(aq) + HBrO3(aq)

Would you expect the equilibrium to lie to the right or the left? Why?

2. HSO4-(aq) + H2PO4-(aq) ↔ SO4-2(aq) + H3PO4(aq)

a) What is the acid in this reaction (from a Brønstead-Lowry point of view)?

b) If the equilibrium lies to the right, what does this mean concerning acid and base strengths?

Homework Answers

Answer #1

1) HBrO2 (aq) + BrO3-(aq) <-------> BrO2-(aq) + HBrO3 (aq)

weak acid weak base strong base strong acid

Among the oxyacids of halogens the strength of acids is

HBrO4 > HBrO3 > HBrO2 > HBrO

The acid - base equillibria always favors the side of weak acid and weak base.

thus theis equilibrium lies to the left (reactant side) which has weak acid and weak base .

2) HSO4- (aq) + H2PO4- <------> SO4-2(aq) + H3PO4(aq)

strong acid strong base weak base weak acid

Thus the equilibrium lies to the right as HSO4- is a stronger acid than H3PO4 and H2PO4- is a stronger base than SO4-2

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