1. Write the following equilibrium expression equations (5 marks) a. PbI2 (s) ⇌ Pb2+ (aq) +...

1. Write the following equilibrium expression equations

a. PbI2 (s) ⇌ Pb2+ (aq) + 2 I- (aq) (report Ksp)

b. CH3COOH (aq) + CH3CH2OH (aq) ⇌ CH3COOCH2CH3 (aq) + H2O (l) (report K)

c. Cl2 (g) + NO2 (g) ⇌ ClNO2 (g) + Cl (g) (report K’)

What would happen to the equilibrium if you increased the concentration of ethanol in reaction (b)? Why?

2. Alkali metals will react with the dihydrogen phosphate anion in solution. Here are two examples:

K+ (aq) + H2PO4 - (aq) ⇌ KH2PO4 (aq) pKa = 6.86

Na+ (aq) + H2PO4 - (aq) ⇌ NaH2PO4 (aq) pKa = 7.20

How much aqueous sodium is present at equilibrium when starting with a solution of 0.83 M NaH2PO4? What is the fraction of sodium in the form of Na+ in this solution at equilibrium?

3. What is the pH of a solution of 6.5 x10-7 M of NaOH?

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Expert Solution

queen_honey_blossom answered 1 year ago

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