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?

Question

Quizplus · Accepted Answer

Since the concentrations of the products are greater than the concentrations of the reactants, the equilibrium lies to the right. This means that phosphoric acid (dihydrogen phosphate) must be a weaker acid than oxalic acid in order for its conjugate base (the dihydrogen phosphate anion) to be a stronger base than the conjugate base of oxalic acid (the hydrogen oxalate anion). Therefore, option C is the correct choice.

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