Question

What volume of 1.50 M NaCl (molar mass = 58.44 g/mol) is needed for a reaction that requires 146.3 g of NaCl?

A) 0.25 L
B) 1.00 L
C) 2.50 L
D) 5.00 L

Answer 1

The question involves calculating the volume of a 1.50 M NaCl solution to obtain 146.3 g of NaCl. After determining the number of moles (2.504 mol), the volume was calculated to be approximately 1.67 L, which does not match any of the provided options, suggesting a possible error in the question.

Step-by-step explanation:

The question asks about the volume of 1.50 M NaCl solution required to provide 146.3 g of NaCl. First, you need to calculate the number of moles of NaCl using its molar mass:

Moles of NaCl = Mass (g) / Molar Mass (g/mol) = 146.3 g / 58.44 g/mol = 2.504 mol

Next, use the molarity (M) of the solution to find the volume (V) needed:

Volume (V) = Moles (n) / Molarity (M) = 2.504 mol / 1.50 mol/L = 1.669 L

Since the options given are in whole liters, the volume required for the solution rounded to the nearest available option is 1.67 L, which is not given as an option in the question. It seems there might be a typo or mistake in the provided options as none of the options given matches the calculated value.