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One of the steps in this experiment asks you to prepare 80.0 ml of a solution...

One of the steps in this experiment asks you to prepare 80.0 ml of a solution of 7.5 % m/v of MgSO4.7H2O in water. Calculate how many grams of MgSO4.7 H2O you need to weigh out?

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Answer #1

m/v% = mass of solute x 100 / volume of solution

7.5   = mass x 100 / 80

mass = 6.0 g

mass of MgSO4.7 H2O   = 6.0 g

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