Question

A student needs 7.6 liters of a 0.18 molar solution for an experiment. How many grams of solute does the student need if the molar mass of the solute is 22.71 g/mol? Round your answer to the nearest 0.01

Answer 1

31.07 g

Step-by-step explanation:

First we calculate how many moles of solute would there be in 7.6 liters of a 0.18 molar solution, using the definition of molarity:

• molarity = moles / volume

• 0.18 M = moles / 7.6 L

• moles = 1.368 mol

Now we calculate the mass of 1.368 moles of solute, using the given molar mass:

• 1.368 mol * 22.71 g/mol = 31.07 g