A student wants to make a 2.76 M KCl solution using 49.7 g KCl. What volume (in mL) is needed to made this concentration? The formula mass for KCl is 74.55 g/mol.

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Quizplus · Accepted Answer

To find the volume needed, first calculate the moles of KCl: 49.7 g / 74.55 g/mol = 0.667 moles. Then, use the molarity formula: M = moles/volume (L). Rearrange to find volume: volume = moles/M = 0.667 moles / 2.76 M = 0.2417 L = 241.7 mL, which rounds to 242 mL.

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