Question

What is the concentration in %w/v of a solution containing 39.2 g of potassium nitrate in 177 mL of solution?​

Answer 1

The concentration of potassium nitrate in a solution containing 39.2 g of solute in 177 mL of solution is 22.15 %w/v.

Step-by-step explanation:

The concentration in %w/v (percent weight/volume) of a solution is calculated by dividing the mass of the solute (in this case, potassium nitrate) by the volume of the solution, then multiplying by 100 to get a percentage. For a solution containing 39.2 g of potassium nitrate in 177 mL of solution, the concentration can be calculated as follows:

(39.2 g / 177 mL) × 100 = 22.15 %w/v

This means the concentration of potassium nitrate in the solution is 22.15 %w/v.

Answer 2

2.36 M

Step-by-step explanation:

Given,

amount of solute, w = 39.2g

volume of solution, v = 177mL

molecular mass of KNO3, M = 94g

Let concentration be 'S' Molar

now, for finding %(w/v) we need to use the formula

`w = (SMV)/(1000)` where volume is in mL

`S = (1000w)/(MV)`

`S = (1000 X 39.2)/(94 X 177)`

`S = 2.36 M`