Question

What size volumetric flask would you use to create 1.50 M
solution using 43.85 g of NaCl?

Answer 1

The size of volumetric flask is 0.5L = 500mL

Step-by-step explanation:

In order to estimate the concentration of a solution in molarity, then the total number of moles of the solute is divided by the total volume of the solution.

Molarity of a solution is given by;

`M= (n)/(V)`

Where;

n= number of moles of solute

V= volume of solution = size of volumetric flask

`n=(m )/( m.m)`

Where;

m= mass of solute=43.85g

m.m= molar mass of solute=58.5g

Note that solute is NaCl(s)

`n=(43.85)/(58.5)=0.75mol`

We know that the molarity is 1.50M

To find the size of the volumetric flask, we make V in M=n/V subject of formula

`V=(n)/(M)`

`V=(0.75)/(1.50)`

`V=0.5`

Therefore, the size of volumetric flask is 0.5L = 500mL.