Questions and Problems\ Q5 A 15.0-

mL

sample of

NaCl

solution has a mass of

15.78g

. After the

NaCl

solution is evaporated to dryness, the dry salt residue has a mass of

3.26g

. Calculate the following concentrations for the

NaCl

solution.\ a.

%((m)/(m))

\ b.

%((m)/(v))

\ c. molarity (M)\ Q6 How many grams of

KI

are in

25.0mL

of a

3.0%((m)/(v))KI

solution?\ Q7 How many milliliters of a

2.5MMgCl_(2)

solution contain

17.5gMgCl_(2)

?

Questions and Problems Q5 A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m) b. %(m/v) c. molarity (M) Q6 How many grams of KI are in 25.0mL of a 3.0%(m/v)KI solution? Q7 How many milliliters of a 2.5MMgCl2 solution contain 17.5gMgCl2