Question

select the correct answer from each drop - down menu. to prepare a 2 m solution of potassium nitrate (kno₃), which quantities must be measured? the mass of the and the volume of the must be measured. solute solution solvent reset next

Explanation:

Step1: Recall molarity formula

Molarity ($M$) is defined as $M=\frac{n}{V}$, where $n$ is the number of moles of solute and $V$ is the volume of the solution in liters. To find the number of moles of solute ($n$), we use $n = \frac{m}{M_m}$, where $m$ is the mass of the solute and $M_m$ is the molar mass of the solute. So, to prepare a solution of a given molarity, we need to measure the mass of the solute (to calculate the number of moles) and the volume of the final solution.

Answer:

The mass of the solute and the volume of the solution must be measured. So the first - drop down menu: solute; the second - drop down menu: solution.