A student dissolves 17.3 g of a mixture of Na₂O and BaO in water. To try to determine the amount of barium present, the student uses a volumetric pipette to add 10.00 mL of 0.550 M sulfuric acid, which causes a precipitate of barium sulfate to form. The student then dries and weighs the precipitate. If the mixture is 50% BaO by mass, will this experiment yield a good estimate? Explain your answer and suggest how the procedure might be improved.