Question

130.0 grams of NaNO 3 is dissolved in water to make a 5.00 L solution. What is the molarity of the solution? (Molar mass of NaNo3 =g/mol) what is the molarity

Answer 1

0.31M

Step-by-step explanation:

Given parameters:

Mass of NaNO₃ = 130g

Volume of solution = 5L

Molar mass of NaNO₃ = 23 + 14 + 3(16) = 85g/mol

Unknown:

Molarity of solution = ?

Solution:

Molarity is one of the ways of expressing concentration.

It is defined as the number of moles in a volume of solution.

Molarity =
`(number of moles)/(volume)`

let us find the number of moles of NaNO₃;

Number of moles =
`(mass)/(molar mass)` =
`(130)/(85)` = 1.53moles

Molarity of solution =
`(1.53)/(5)` = 0.31M