Chemical Compounds Worksheet Page 2
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1
2Formulas of ionic compounds.
Page
2
Problems
A. This section uses imaginary ions. Thus you can work here on neutrality without even
having to think about real chemicals. (Real ions rarely have a charge greater than ±3.
Imaginary ions, of course, do not have this restriction. Good practice!)
2-
3-
3+
+
+
-
1. A
and R
2. A
and T
3. E
and Q
4+
4+
2-
2+
2-
-
4. G
and Q
5. G
and R
6. D
and R
2+
4-
2+
3-
2+
5-
7. D
and X
8. D
and T
9. D
and Z
3+
2-
4+
3-
4+
5-
10. E
and R
11. G
and T
12. G
and Z
B. This section uses real monatomic ions. Most of these are common ions that you should be
able to figure out from the periodic table; however, you are given the ions, including the
charge. All you need to do is to achieve neutrality.
2-
3-
3+
+
+
-
13. Na
and S
14. Na
and N
15. Al
and Cl
4+
4+
2-
2+
2-
-
16. Pb
and Cl
17. Pb
and O
18. Ca
and S
3+
2+
3-
2+
-
-
19. Al
and Br
20. Ca
and N
21. Ca
and Br
3+
2-
3+
3-
2+
3-
22. Al
and S
23. Al
and N
24. Mg
and P
C. This section uses real (and common) ions, including both monatomic and polyatomic ions.
Note that all the polyatomic ions shown here are ones you should know.
2-
3-
3-
+
+
+
25. Na
and SO
26. Na
and PO
27. K
and PO
4
4
4
2+
2-
3+
+
-
-
28. NH
and Br
29. Mg
and SO
30. Al
and NO
4
4
3
2+
2-
2+
3-
2+
-
31. Ca
and CO
32. Ca
and PO
33. Ca
and NO
3
4
3
2-
2+
2-
+
-
+
34. NH
and S
35. Pb
and OH
36. NH
and SO
4
4
4
Answers
Sect A.
1. A
R
2. A
T
3. EQ
2
3
3
4. GQ
5. GR
6. DR
4
2
7. D
X
8. D
T
9. D
Z
2
3
2
5
2
10. E
R
11. G
T
12. G
Z
2
3
3
4
5
4
Sect B.
13. Na
S
14. Na
N
15. AlCl
2
3
3
16. PbCl
17. PbO
18. CaS
4
2
19. AlBr
20. Ca
N
21. CaBr
3
3
2
2
22. Al
S
23. AlN
24. Mg
P
2
3
3
2
Sect C.
25. Na
SO
26. Na
PO
27. K
PO
2
4
3
4
3
4
28. NH
Br
29. MgSO
30. Al(NO
)
4
4
3
3
31. CaCO
32. Ca
(PO
)
33. Ca(NO
)
3
3
4
2
3
2
34. (NH
)
S
35. Pb(OH)
36. (NH
)
SO
4
2
2
4
2
4
x11\ionic 9/27/02
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