Question

Problems 307 How many milliliters of a 2.5 M NaCl solution would be needed to prepare each solution? a. 1.5L of a 0.75m solution ​

Answer 1

Answer:

450 mL

Explanation:

First we calculate how many NaCl moles would there be in 1.5 L of a 0.75 M solution, using the definition of molarity:

• Molarity = moles / Liters

• Moles = Molarity * Liters

• Moles = 1.5 L * 0.75 M =1.125 mol

Once again using the definition of molarity, we now calculate how many liters of a 2.5 M solution would have 1.125 moles:

• Liters = 1.125 mol / 2.5 M = 0.45 L

Finally we convert 0.45 liters to mL:

• 0.45 L * 1000 = 450 mL