Textbook G.10

[Averie Moore 2F]

G.10: What mass (in grams) of anhydrous solute is needed to prepare each of the following solutions? a) 1.00L of 0.125M K2SO4(aq); b) 375mL of 0.015M NaF (aq); c) 500mL of 0.35M C12H22O11.

I'm not sure where to start with this question. Do I use units of L or mL in my calculations? I don't know what "prepare" means here, so I'm not sure what the problem is asking me to do.

[Lucas Vu 2G]

To solve this problem make use of the equation in which c is the concentration of the solution, n is the moles of the solute, and V is the volume of the solvent in liter. The question asks you to give the number of grams needed, so you are solving for moles needed to create a solution with the given molarity and volume. by rewriting the equation above to you can more easily solve for moles of solute. After finding the number of moles needed, you can convert them to grams by using the molar mass of the solute. I hope this helps!