A student is given the task of preparing a 0.10 M solution of \(\ce{H2SO4}\) (molar mass = 98 g mol-1) to be used by the class in an experiment. The class needs 1.00 L of this solution. The student reasons that they will need to weigh 9.8 g of sulfuric acid and add this to a 1 L volumetric flask, add about 500 mL distilledwater and swirl the flask to mix. After the solution is mixed, additional distilled water is added to bring the level to the line in the volumetric flask. Finally the flask is stoppered and inverted several times to assure the solution is well mixed. The student presents this procedure to the teacher, who rejects it because of a mistake. What was the student’s mistake?

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