What is the mass of solute in grams in a 3 M solution of NaCl in 1 L of solution

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Question: What is the mass of solute in grams in a 3 M solution of NaCl in 1 L of solution? (2023)

Options:

Correct Answer: 174.32 g

Solution:

Molar mass of NaCl = 58.44 g/mol; mass = moles × molar mass = 3 moles × 58.44 g/mol = 175.32 g

What is the mass of solute in grams in a 3 M solution of NaCl in 1 L of solution? (2023)

What is the mass of solute in grams in a 3 M solution of NaCl in 1 L of solution? (2023)

Step 1: Understand that 'M' in 3 M means molarity, which is moles of solute per liter of solution.
Step 2: Recognize that a 3 M solution means there are 3 moles of NaCl in 1 liter of solution.
Step 3: Find the molar mass of NaCl. Sodium (Na) has a mass of about 22.99 g/mol and Chlorine (Cl) has a mass of about 35.45 g/mol.
Step 4: Calculate the molar mass of NaCl: 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.
Step 5: Use the formula for mass: mass = moles × molar mass.
Step 6: Substitute the values: mass = 3 moles × 58.44 g/mol.
Step 7: Calculate the mass: 3 × 58.44 = 175.32 grams.

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