Question

How many milliliters of 0.2560 M KCl solution will contain 20.00 g of KCl?

Answer is 1048 mL solution but how do I get to the answer?

Answer 1

1048 mL

Step-by-step explanation:

Step 1: Given data

• Concentration of the solution: 0.2560 M

• Mass of KCl (solute): 20.00 g

Step 2: Calculate the moles corresponding to 20.00 g of KCl

The molar mass of KCl is 74.55 g/mol.

20.00 g × 1 mol/74.55 g = 0.2683 mol

Step 3: Calculate the volume of the solution

Molarity is equal to moles of solute divided by liters of solution.

M = moles of solute / volume of solution

volume of solution = moles of solute / M

volume of solution = 0.2683 mol / (0.2560 mol/L)

volume of solution = 1.048 L = 1048 mL