Question

How much NaCl will you need to make 100 mL of 0.85 % (W by V) NaCl

Answer 1

Answer:

For 0.85% w/v we require 0.85 g of NaCl into 100 mL of water.

Explanation:

Given data:

Percentage w/v = 0.85%

Volume of solution = 100 mL

Mass of NaCl = ?

Solution:

0.85%  = 85/100

0.85%  = 0.85

It means for 0.85% w/v we require 0.85 g of NaCl into 100 mL of water.

Answer 2

therefore 0.85g of NaCl will we need to make 100ml of 0.85 % (Weight by volume) NaCl.

let x g of NaCl will we need to make 100 mL of 0.85% (W by V ) NaCl.

so using formula,

percentage concentration of NaCl = weight of NaCl in g /volume of solution in ml × 100

⇒0.85 = x g/(100ml) × 100

⇒x = 0.85 g

hence, mass of NaCl = 0.85g

therefore 0.85g of NaCl will we need to make 100ml of 0.85 % (Weight by volume) NaCl.