Question

Mr. Romeo wants to make a solution of NaOH. He measures out 97.68 grams and puts it into 3 liters

What is the molarity of the solution he created? Round to 2 Decimal points

Answer 1

Answer: Molarity of the solution is 0.813 M.

Step-by-step explanation:

Given : Mass of NaOH = 97.68 g

Volume of solution = 3 L

The molar mass of NaOH is 39.99 g/mol. Hence, moles of NaOH are calculated as follows.

`No. of moles = (mass)/(molar mass)\\= (97.68 g)/(39.99 g/mol)\\= 2.44 mol`

Molarity is the number of moles of solute present in a liter of solution. Therefore, molarity of given solution is calculated as follows.

`Molarity = (no. of moles of solute)/(Volume (in L))\\= (2.44 mol)/(3 L)\\= 0.813 M`

Thus, we can conclude that molarity of the solution is 0.813 M.