Question

Calculate the grams of NaCl (5.5 by mass) in 250 grams of commercial bleach solution

Answer 1

Mass of NaCl L 13.75 g

Further explanation

Given

The solution of 5.5% by mass

mass of commercial bleach solution : 250 g

Required

mass of NaCl

Solution

Percent mass (% w/w) = percent mass of solute in 100 g mass of solution

Solution = solute + solvent

Solute = NaCl

Solution = Commercial bleach

Can be formulated :

$\tt \%mass(w/w)=\dfrac{mass~solute}{mass~solution}\times 100\%$

Input given values in formula :

$\tt \%mass=\dfrac{mass~NaCl}{mass~commercial~bleach}\times 100\%\\\\5.5\%=\dfrac{mass~NaCl}{250}\times 100\%\\\\mass~NaCl=\boxed{\bold{13.75~g}}$