Question

3M of Nacl in water , 500ml volume then molarity, gram of solvent, volume of solvent ? ​

Answer 1

Answer:

3 Molar solution means there are 3 moles of NaClsalt in 1 litre.

Molecular weight of NaCl = 55.44

Hence, there are 3 * 58.44 gms in 1 Litre of water. 

Density = mass × volume Mass of 1 litre of solution = 1.25 gms /ml *1000 ml = 1,250 gms

V = volume of water added to make the solution

175.32 gms +1 gm/ml * V = 1,250 gm

V = 1,074.68 ml

1,074.68 ml gms of water is mixed with 3 moles of NaCl to make 3 M solution. 

Molaity = mass of solute in number of moles / mass of solvent in kg'

= 3 / 1.07468 kg

= 2.7915 m