Describe how are you going to prepare 100 mL 3M NaOH solution from NaOH pellets

Question

Concentration needed: 3M solution

Volume needed: 100 mL

Concentration available: pellets (solid)

Please state a complete detailed solution. Please help me ASAP

Answer 1

Calculations:

3 M NaOH means 3 mols NaOH / liter of solution

100 ml solution x 1 L / 1000 ml = 0.100 liters of solution desired

0.100 liters x 3 mol NaOH / liter = 0.3 mol NaOH needed

Molar mass NaOH = 40 g / mol

40 g / mol x 0.3 mol = 12 g NaOH needed

Procedure:

Weigh out 12 g NaOH

Dissolve in water (less than 100 ml)

Transfer to a 100 ml volumetric flask

Fill to the 100 ml line to make 100 ml of 3 M NaOH