Answer:
~120 grams water
Step-by-step explanation:
% LiCl = (Mass LiCl) / (Mass of Soln) x 100%
= Mass LiCl / (Mass H₂O + Mass LiCl) x 100% = 6.7% (divide both sides by 100%)
=> Mass LiCl / Mass H₂O + Mass LiCl = 0.067
=> Mass LiCl = 0.067(Mass H₂O) + 0.067(Mass LiCl)
Solve for Mass H₂O:
=> Mass LiCl - 0.067(Mass LiCl) = 0.067(Mass H₂O)
=> Mass H₂O = (Mass LiCl - 0.067(Mass LiCl) / 0.067
= 8.6g - 0.067(8.6g) / 0.067 = 8.0238g / 0.067 = 119.76g H₂O = ~120grams