Question

How many moles of kcl would be dissolved in 4 l of water to make a 2 m solution? a. 8 moles b. 4 moles c. 2 moles d. one divided by two mole

Answer 1

Make a 2 M solution of KCl in 4 liters of water, 8 moles of KCl would be dissolved. This is calculated using the formula for molarity, which is Molarity (M) = moles of solute (n) / volume of solution in liters (L).

Step-by-step explanation:

To determine how many moles of KCl would be dissolved in 4 liters of water to make a 2 M solution, you can use the formula Molarity (M) = moles of solute (n) / volume of solution in liters (L). Given the molarity (2 M), we can rearrange the formula to find the moles of solute (n) by multiplying the molarity by the volume in liters. Therefore, n = Molarity × Volume, which gives us n = 2 mol/L × 4 L.

Calculating this, we get:

• n = 2 mol/L × 4 L = 8 moles

Hence, the correct answer is 8 moles of KCl would be needed to make a 2 M solution in 4 liters of water.