Calculate the Molarity of a 0.400 L solution containing 14.9 g KCl. Molar mass of KCl is 74.55 g/molGroup of answer choices2.00 M0.0800 M0.200 M0.500 M
Question
Calculate the Molarity of a 0.400 L solution containing 14.9 g KCl.
Molar mass of KCl is 74.55 g/mol.
Solution
Step 1: Calculate the number of moles of KCl.
The number of moles is calculated by dividing the mass of the substance by its molar mass.
Number of moles = mass / molar mass Number of moles = 14.9 g / 74.55 g/mol = 0.2 mol
Step 2: Calculate the molarity of the solution.
Molarity is calculated by dividing the number of moles of solute by the volume of the solution in liters.
Molarity = moles / volume Molarity = 0.2 mol / 0.400 L = 0.500 M
So, the molarity of the solution is 0.500 M.
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