A Student Adds 0

question 36

Multiple Choice

A student adds 0.1 mol of oxalic acid and 0.1 mol of sodium dihydrogen phosphate to enough water to make 1.0 L of solution.The following equilibrium is established with the concentrations of the products greater than the concentrations of the reactants.Which of the statements about the equilibrium system is correct?
H₂C₂O₄(aq) + H₂PO₄^-(aq)
HC₂O₄^-(aq) + H₃PO₄(aq)

• A)Oxalic acid is a weaker acid than phosphoric acid.
• B)The hydrogen oxalate anion,HC₂O₄^-,is a stronger base than the dihydrogen phosphate anion,H₂PO₄^-.
• C)Phosphoric acid is a weaker acid than oxalic acid.
• D)The dihydrogen phosphate anion,H₂PO₄^-,is a stronger acid than oxalic acid.
• E)Water is a stronger acid than either oxalic or phosphoric acids.

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