InterviewSolution
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InterviewSolution
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a. Describe how you would prepare 100 g of asolution that is 0.5% phenolphthalein by mass. |
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Answer» Since the solute (phenolphthalein) is a solid, the solution is percent by mass. Mass percent means the number of grams of solute per 100 g of solution. mass percent = (mass of solute/mass of solution) × 100% mass of solute = mass percent × mass of solution/100% = 0.5% x 100 g/100% = 0.5 g Since the total mass of the solution equals 100 g, the remaining 99.5 g of the solution is water. To prepare the solution, dissolve 0.5 g phenolphthalein in 99.5 g distilled or deionized water. |
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