A solution is prepared by dissolving 5.00 g of NaCl (MW 58.44 g/mol) in water to a final volume of 0.500 L. What is the molarity?

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Prepare for the NANTeL Chemistry Certification - Engineering Fundamentals Test. Utilize study resources like flashcards and multiple choice questions with hints and explanations. Ensure your success for the exam!

Multiple Choice

A solution is prepared by dissolving 5.00 g of NaCl (MW 58.44 g/mol) in water to a final volume of 0.500 L. What is the molarity?

Explanation:
Molarity is moles of solute per liter of solution. Convert the mass to moles using the molar mass, then divide by the volume in liters. 5.00 g NaCl ÷ 58.44 g/mol = 0.0856 mol. 0.0856 mol ÷ 0.500 L = 0.171 M. So, the solution has a molarity of 0.171 M.

Molarity is moles of solute per liter of solution. Convert the mass to moles using the molar mass, then divide by the volume in liters.

5.00 g NaCl ÷ 58.44 g/mol = 0.0856 mol.

0.0856 mol ÷ 0.500 L = 0.171 M.

So, the solution has a molarity of 0.171 M.

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