Problema Solution
You've been asked to make a 50mL of 2% dextrose solution from a 30% dextrose stock. How much diluent will you need for the mixture? How much stock would you need to make 150mL of 5% solution?
Answer provided by our tutors
let
x = mL of the diluent
d = mL of 30% dextrose stock
x + d = 50
0.30d + 0*x = 0.02*50
by solving we find
x = 47.67 mL
d = 3.33 mL
click here to see the step by step solution of the equation
to make 50 mL of 2% dextrose solution you will need 47.67 mL of 30% dextrose stock and 47.67 mL of diluent.
How much stock would you need to make 150mL of 5% solution?
let
x = mL of the diluent
d = mL of 30% dextrose stock
x + d = 150
0.30d + 0*x = 0.05*150
by solving we find
x = 125 mL
d = 25 mL
click here to see the step by step solution of the system of equations
you will need 25 mL of 30% dextrose stock and 125 mL diluent.