Answer:
The answer to your question is given below
Step-by-step explanation:
To prepare 3 M solution of NaOH, do the following:
1. Determine the number of mole of NaOH in the solution. This can be obtained as follow:
Molarity of NaOH = 3 M
Volume = 1 L
Mole of NaOH =?
Mole = Molarity × Volume
Mole of NaOH = 3 × 1
Mole of NaOH = 3 moles
2. Determine the mass of 3 moles of NaOH. This can be obtained as follow:
Mole of NaOH = 3 moles
Molar mass of NaOH = 23 + 16 + 1
= 40 g/mol
Mass of NaOH =?
Mass = Mole × molar mass
Mass of NaOH = 3 × 40
Mass of NaOH = 120 g
3. Measure 120 g of NaOH and dissolve in 1 L of water in a volumetric flask to produce 3 M of the solution.