Question

What mass of NaOH us required to prepare 2.5dm of 1.5 M NaOH solution​

Answer 1

Mass = 150 g

Step-by-step explanation:

Given data:

Mass of NaOH = ?

Volume of solution = 2.5 dm³ or 2.5 L

Molarity of solution = 1.5 M

Solution:

Formula:

Molarity = number of moles / volume in L

Number of moles = 1.5 M × 2.5 L

Number of moles = 3.75 mol

Mass of sodium hydroxide:

Mass = number of moles × molar mass

Mass = 3.75 mol × 40 g/mol

Mass = 150 g