QuestionApril 18, 2026

6. Calculate the mass of solute required to make 750.mL of a 2.5M sodium chloride solution.

6. Calculate the mass of solute required to make 750.mL of a 2.5M sodium chloride solution.
6. Calculate the mass of solute required to make 750.mL of a 2.5M sodium chloride solution.

Solution
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Answer

109.58\ \text{g} Explanation 1. Convert volume to liters 750.\text{ mL} = 0.750\ \text{L} 2. Calculate moles of solute **Formula:** n = M \times V n = 2.5\ \text{mol/L} \times 0.750\ \text{L} = 1.875\ \text{mol} 3. Calculate mass **Formula:** m = n \times M_{\text{molar}} Molar mass of NaCl = 58.44\ \text{g/mol} m = 1.875 \times 58.44 = 109.575\ \text{g}

Explanation

1. Convert volume to liters <br /> $750.\text{ mL} = 0.750\ \text{L}$ <br /><br />2. Calculate moles of solute <br /> **Formula:** $n = M \times V$ <br /> $n = 2.5\ \text{mol/L} \times 0.750\ \text{L} = 1.875\ \text{mol}$ <br /><br />3. Calculate mass <br /> **Formula:** $m = n \times M_{\text{molar}}$ <br /> Molar mass of NaCl = $58.44\ \text{g/mol}$ <br /> $m = 1.875 \times 58.44 = 109.575\ \text{g}$
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