Question

To prepare a 2 M solution of potassium nitrate (KNO3), which quantities must be measured?

The mass of the 1.____ and the volume of the 2.____ must be measured.Copy


they both have the same choices.
A. Solute
B. Solution
C. Solvent

Answer 1

To prepare a 2 mol·L⁻¹ solution of KNO₃, you must measure the mass of the A. solute and the volume of the B. solution.

The formula for molar concentration (c) is

c = moles of solute/litres of solution

∴ You measure out a mass of KNO₃ equivalent to two moles (202.20 g), and then you add enough water to make the volume of solution up to 1 L.

Answer 2

Answer:

A and B

Explanation: