Question

You are trying to dissolve 11g of glucose in 100 mL water. You then proceeded to dilute a 20 mL sample of that solution to 0.500L water. Solve for the grams of glucose that are in a 100mL of the final solution.

Answer 1

Solution:

$density = \dfrac{11g}{100ml}=0.11(\frac{g}{ml})$

$m=V*d=20ml*0.11(\frac{g}{ml})=2.2g$

 

$0.500L=500ml$

$m=\dfrac{2.2g}{500ml}*100ml=0.44g$

Answer:

We need to add 0.44 g of glucose to 100 ml of the final solution.