A Student Adds 0

question 35

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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