How many grams of KF must be dissolved in 0.500 L of water to make a 1.50 M solution?

Answer 1

You are given the volume (0.500 L) and molarity (1.50M) of the solution, Use the relation between molarity, volume and moles of solute and determine the moles, Solute is KF

Molarity = moles/ volume in liters,

1.50M = moles of KF/ 0.500 L

Moles of KF= 1.50*0.500 = 0.75 moles

Change the moles of KF into grams of KF by multiplying the moles with molar mass of KF

58.0967g/mol *0.75 moles = 43.5g