Using Acid Strength Tables Chemistry Worksheets Page 2
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1
2Worksheet 4.4
Acid and Basic Anhydrides
Classify each formula as an acid anhydride, basic anhydride, strong acid, weak acid, strong, or
weak base. For each formula write an equation to show how it reacts with water. For anhydrides
write two equations.
Formula
Classification
Reaction
O →
12. Na
O
basic anhydride
Na
O
+
H
2NaOH
2
2
2
O →
13. CaO
basic anhydride
CaO
+
H
Ca(OH)
2
2
O →
14. SO
acid anhydride
SO
+
H
H
SO
3
2
2
4
3
O →
15. CO
acid anhydride
CO
+
H
H
CO
2
2
2
3
2
O →
16. SO
acid anhydride
SO
+
H
H
SO
2
2
2
3
2
O →
+
-
17. HCl
strong acid
HCl
+
H
H
O
+
Cl
2
3
O
+
-
18. NH
weak base
NH
+
H
NH
+
OH
3
2
4
3
→
+
-
19. NaOH
strong base
NaOH
Na
+
OH
O
+
-
20. HF
weak acid
HF
+
H
H
O
+
F
2
3
O
+
-
21. H
PO
weak acid
H
PO
+
H
H
O
+
H
PO
3
4
2
3
2
4
3
4
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