Answer to Question #337113 in General Chemistry for Ash

Question

You need to make an aqueous solution of 0.140 M potassium nitrate for an experiment in lab, using a 125 mL volumetric flask.

How much solid potassium nitrate should you add?

blank grams

Answer 1

Hello !

In 1 L of sotution - 0.14 mol KNO3, in 0.125 L will be x . From proportio x = 0.0175 mol. Molar mass of KNO3 is 101 g/mol. => 0.0175*101=1.767 (g). Correct answer is 1.767 g.