Question

find the molarity of 30g of NaOH dissolved in 100g of solution​

Answer 1

Answer:

7.5 M

Explanation:

Molarity = moles / volume

given mass of NaOH = 30 g

=> moles of NaOH = mass / molar mass = 30 g / (40 g/mol) = 0.75 mol

mass of solution = 100g

if you know density of solution then use that value.

let density of solution = 1 g/mL

=> volume of 100g solution = mass / density = 100g / (1 g/mL) = 100 mL = 0.1 L

=> Molarity of solution = moles / volume = 0.75 mol / 0.1 L = 7.5 M

Thank you!