Question

Ocean water is about 0.600M NaCl and has a density of 1.027g/mL. Find the percentage of NaCl (w/w) and percentage NaCl (w/v).

Answer 1

w/w = 3.42 w/v = 3.51

Step-by-step explanation:

given molarity of NaCl = 0.6 M

therefore there are 0.6 moles of NaCl in 1000 ml of water.

`density=(mass)/(volume)`

therefore mass of water = 1.027×1000= 1027 g.

w/w ratio =
`(mass of solute)/(mass of solvent)* 100`

=
`(0.6* 58.5)/(1027)* 100`

= 3.42

w/v ratio =
`(mass of solute)/(volume of solvent)100`

=
`(0.6* 58.5)/(1000)* 100`

=3.51