Question

How would you prepare 1.0 L of a o.500 M solution of potassium chloride?

Answer 1

Take a `1L` volumetric flask, and thru a funnel quantitatively transfer a `37.276*g` mass of potassium salt. Fill the flask up to volume.

Explanation:

So all you have to do is accurately weigh the potassium chloride (of course if it's a bit out, you still know the accurate concentration). Potassium chloride has a molar mass of `74.5513*g*mol^-1`; it is very (and easily) soluble in water, so you will have no difficulty in dissolving such a mass BEFORE you fill the flask to volume.