Question

69.0 mL of a 1.20 M solution is diluted to a volume of 218 mL. A 109-mL portion of that solution is diluted using 143 mL of water. What is the final concentration?

Answer 1

mv=mv
1.2*.069=.218*x
x is the morality of the solution in the 218ml solution

Answer 2

so then use x*.109=.143y
y=your final concentration