Practice Homework 18: Predicting Products – Single Replacement (SR)

This assignment is for practice only. It is not due.

You will need the following reference tables for this practice assignment:
o
Periodic Table (symbols only)
o
Activity Series Table (Top Dog Chart)
o
Solubility Rules

You only need to consult your solubility rules if “water is hanging around.”

The “training wheels are off.” I will no longer use parentheses for polyatomic ions if the parentheses are
not needed.

If a reaction occurs, put a check in the first box. Then, predict the products.

If there is no reaction (all reactants and products are aqueous), then write NR in the first box and move
on to the next question.

Remember that it helps to name the product before writing its chemical formula.

Do not balance these equations. I just want to see if you know the products.

If you balance these equations – and the balance is incorrect – you will lose points.
1)
Li(s)
+
CaCl2(aq)

2)
I2(s)
+
CaCl2(aq)

3)
NiBr3(aq)
+
Zn(s)

Note:
4)
Note:
5)
Remember that Zn always forms 2+ in ionic compounds.
AgNO3(aq)
+
Zn(s)

Remember that Ag is always 1+ in ionic compounds.
Sr2(PO4)3(s)
+
Fe(s)

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6)
Al(s)
+
HBr(aq)

7)
Cl2(s)
+
HBr(aq)

8)
Cd(s)
+
H2O(l)

Note:
In SR and DR rxns, always rewrite water as HOH when predicting products.
Note:
Remember that Cd is always 2+ in ionic compounds.
9)
Note:
Co(s)
+
HCl(aq)
For this reaction (if it occurs), assume that cobalt will have a charge of 6+.
10)
Ca(s)
+
Na3(PO4)(aq)
11)
Cr(NO3)3(s)
+
Mg(s)
Hint:



Chromium is a transition metal and magnesium is a Group 2A Metal
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ANSWERS

1)
Li(s)
+
CaCl2(aq)

NR
2)
I2(s)
+
CaCl2(aq)


3)
NiBr3(aq)
+
Zn(s)

Note:

4)
Note:
NR
5)

6)


LiCl(aq) +
Ca(s)
ZnBr2(aq) + Ni(s)
Remember that Zn always forms 2+ in ionic compounds.
AgNO3(aq)
+
Zn(s)
Zn(NO3)2(aq) + Ag(s)

Remember that Ag is always 1+ in ionic compounds.
Sr2(PO4)3(s)
+
Fe(s)
Al(s)
+
HBr(aq)

AlBr3(aq) + H2(g)
7)
Cl2(s)
+
HBr(aq)

HCl(aq) + Br2(l)
8)
Cd(s)
+
H2O(l)

Cd(OH)2(s) + H2(g)

Note:
In SR and DR rxns, always rewrite water as HOH when predicting products.
Note:
Remember that Cd is always 2+ in ionic compounds.
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9)
Co(s)
Note:
+
HCl(aq)

CoCl6(aq) + H2(g)
For this reaction (if it occurs), assume that cobalt will have a charge of 6+.
10)
Ca(s)
+
Na3(PO4)(aq)
11)
Cr(NO3)3(s)
+
Mg(s)


Ca2(PO4)3(s) + Na(s)
Mg(NO3)2(aq) + Cr(s)
Hint:
Chromium is a transition metal and magnesium is a Group 2A Metal
Solution:
Look at the bottom of the “Top Dog” Chart. It says that a “Group 2A
Metal” will always “beat” a transition metal. Therefore, a reaction
occurs.
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