Question

the density of 3M solution of NaCl is 1.25 gram per mole per litre calculate molarity of the solution​

Answer 1

Explanation:

3M show that those are 3 moles of NaCL salt in 1 litre.

molecules weight of NaCL = 58.44

3×58.44 grams in litre of water

Density= mass / volume

mass of 1 litre solution = 1.25 gm/ ml × 1000mol

= 1250 gm

v= volume of water added to make solution

175.32 g + 1gml.xv =1250 g

v = 1704 .18 ml

= 1.07468

molarity = mass of solute / mass of solution

= 3/ 1.07468 = 2.7915 molarity.