Ch 100: Fundamentals for Chemistry
Instructor: Tony Zable
Page: 1
Solutions & Moles Worksheet
1) Identify the ions in the following ionic compounds: o NaCl o MgCl
2
.
(H
2
0)
6 o NH
4
Cl o CaCl
2 o NaNO
3
2) Name the following ionic compounds: o NaCl o MgCl
2
.
(H
2
0)
6 o CaCl
2 o NH
4
Cl o NaNO
3
3) Determine the molar mass for the following ionic compounds: o NaCl o CaCl
2 o NaNO
3 o MgCl
2
.
(H
2
0)
6 o NH
4
Cl
4) You have obtained the following mass measurements for the ionic compounds below.
Determine the number of moles of each sample. a) 5.03 g of NaCl: __________ b) 4.98 g of CaCl
2
: __________ c) 5.12 g of NaNO
3
: __________ d) 5.28 of MgCl
2
.
(H
2
0)
6
: __________ e) 4.74 g of NH
4
Cl: __________

Ch 100: Fundamentals for Chemistry
Instructor: Tony Zable
Page: 2
Solutions & Moles Worksheet
5) Each of the samples are placed into a separate 5.0 mL volume H
2
O and completely dissolved. Determine the mass concentration of each solution in grams/L. o NaCl o CaCl
2 o NaNO
3 o MgCl
2
.
(H
2
0)
6 o NH
4
Cl
6) Determine the molar concentration of each solution in moles/L (M). o NaCl o CaCl
2 o NaNO
3 o MgCl
2
.
(H
2
0)
6 o NH
4
Cl
7) Determine the number of moles of each ion in each solution. o NaCl o CaCl
2 o NaNO
3 o MgCl
2
.
(H
2
0)
6 o NH
4
Cl
Final Question: How much H
2
O would you need to add to your NaCl solution to get a final concentration (molarity) of 0.15 mol/L?