You have a 0. 7 M solution. Your job is to produce 50 mL of a 0. 4 M solution.
A. How much of the 0. 7 M solution do you need to start with? (Show your work. )
B. How many moles of solute were in the 0. 7 M solution? (Show your work. )
C. How much water do you need to add to the previous amount of the 0. 7 M solution to dilute it to
0. 4 M? (Show your work. )
D. A student decides to put double the amount of water calculated in Part C. Describe what effect this
will have on the overall concentration of the resulting solution. Justify your answer.
