Question

How many grams of NaOH would be needed to be dissolved in 450 mL of water to make a 2.3 M solution?

Answer 1

41.4 grams of NaOH

Step-by-step explanation:

Molarity is the data of moles of solute in 1L of solvent, so 2.3 moles of NaOH are contained in 1L or which is the same, 1000mL.

Let's find out the moles in our volume 450 mL by a rule of three:

In 1000 mL we have 2.3 moles

In 450 mL we have (450. 2.3)/1000 = 1.035 moles

Moles . molar mass = mass

1.035 m . 40 g/m = 41.4 g