Question

A chemist has a 0.200 M solution of potassium hydroxide (molar mass = 56.1g/mol). What mass of KOH is dissolved in 3.20 L of the solution?

Answer 1

35.904g

Step-by-step explanation:

`concentration = (mole)/(volume) \\ 0.200 = (n)/(3.20) \\ n = 0.640mol \\ n (mass)/(molar \: mass) \\ mass = n * molar \: mass \\ molar \: mass = 56.1gmol {}^( - 1) \\ mass = 56.1 * 0.640 \\ mass = 35.904g`