Arun has prepared `0.01%` (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?

Options

A. 1.00 g of NaCl + 100 g of water
B. 0.11 g of NaCl + 100 g water
C. 0.01 g of NaCl + 99.99 g of water
D. 0.10 g of NaCl + 99.90 g of water

Explanation

By definition 0.01% (by mass) solution means that 0.01 g of sodium chloride is dissolved in 0.99 g (by mass) of water. Therefore (c ) represents the correct composition of the solution. This can be further verified as follows :
Mass percent = `("Mass of sodium chloride")/("Mass of solution")xx 100`
`=((0.01g))/((0.99 + 0.01))xx 100 =0.01%`