Question

Molarity Calculation?

To prepare 50.0mL of 4.0M Nac solution, how many grams of solute and mL of solvent do you need? (Hint: 1 mol NaCl= 58.44g)

Could you explain how to get the answers and the equation i'm supposed to use?

Answer 1

volume of solution=50ml=`1/20=0.05` L
Molarity(M)=4M
so, `M=n_(solute)/"volume of solution( in L)"`
`4=(W/58.5)/0.05`
`W_(solute)=11.7` gm
as, it is the NaCl solution so, solvent is water which is 50 ml as, after the mixing of NaCl the solution doesn't change its volume
so, volume of solvent is 50 ml.