EXERCISE 7-2 Net Ionic Equations and Double Replacements
Click on the correct answer
1
Balance each of the reactions and then write the net ionic equation for the reaction. Choose the correct net ionic equation for each reaction.
__ CaCl
2
(aq) + __AgNO
3
(aq) = __ Ca(NO
3
)
2
(aq) + __AgCl(s)
Ca
2+
+ 2 NO
3
-
= Ca(NO
3
)
2
(aq)
Ag
+
+ Cl
-
= AgCl(s)
2 Ag
+
+ 2 Cl
-
= 2 AgCl(s)
Ca
2+
+ 2 NO
3
-
+ 2 Ag
+
+ 2 Cl
-
= Ca(NO
3
)
2
(aq) + 2 AgCl(s)
None of the previous answers.
2
Choose the net ionic equation for:
Al(s) + __ HCl(aq) = __AlCl
3
(aq) + __H
2
(g)
Al(s) + 3 Cl
-
= __AlCl
3
(aq)
2 Al(s) + 6 H
+
+ 6 Cl
-
= 2 Al
3+
+ 6 Cl
-
+ 3 H
2
(g)
2 Al(s) + 6 H
+
= 2 Al
3+
+ 3 H
2
(g)
None of the previous answers.
3
Choose the net ionic reaction for:
__CaCl
2
(aq) + __Na
3
PO
4
(aq) = __Ca
3
(PO
4
)
2
(s) + __NaCl(aq)?
3 Ca
2+
+ 2 PO
4
3-
= Ca
3
(PO
4
)
2
(s)
Cl
-
+ Na
+
= NaCl(aq)
3 Ca
2+
+ 6 Cl
-
(aq) + 6 Na
+
+ 2 PO
4
3-
= 2 Ca
3
(PO
4
)
2
(s) + 6 Na
+
+ 6 Cl
-
None of the previous answers.
4
Choose the net ionic equation for:
__NaOH(aq) + __H
2
SO
4
(aq) = __Na
2
SO
4
(aq) + __H
2
O(l)?
2 Na
+
+ 2 OH
-
+ 2 H
+
+ SO
4
2-
= 2 Na
+
+ SO
4
2-
+ 2 H
2
O(l)
2 Na
+
+ SO
4
2-
= Na
2
SO
4
(aq)
H
+
+ OH
-
= H
2
O(l)
2 OH
-
+ 2 H
+
= 2 H
2
O(l)
None of the previous answers.
5
Choose the net ionic equation for:
__Na
2
CO
3
(aq) + __HNO
3
(aq) = __NaNO
3
(aq) + __CO
2
(g) + __H
2
O(l)
2 Na
+
+ CO
3
2-
+ 2 H
+
+ 2 NO
3
-
= 2 Na
+
+ 2 NO
3
-
+ CO
2
(g) + H
2
O(l)
CO
3
2-
+ 2 H
+
= CO
2
(g) + H
2
O(l)
Na
+
+ NO
3
-
= NaNO
3
(aq)
None of the previous answers.
6
Choose the net ionic equation for:
Zn(s) + __ FeCl
3
(aq) = __ZnCl
2
(aq) + __Fe(s)
3 Zn(s) + 2 Fe
3+
+ 6 Cl
-
= 3 Zn
2+
+ 6 Cl
-
+ 2 Fe(s)
3 Zn(s) + 6 Cl
-
= 3 ZnCl
2
(aq)
3 Zn(s) + 2 Fe
3+
= 3 Zn
2+
+ 2 Fe(s)
None of the previous answers.
7
Choose the net ionic equation for:
__Ba(OH)
2
(aq) + __H
2
SO
4
(aq) = __BaSO
4
(s) + __H
2
O(l)?
Ba
2+
+ 2 OH
-
+ 2 H
+
+ SO
4
2-
= BaSO
4
(s) + 2 H
2
O(l)
Ba
2+
+ SO
4
2-
= BaSO
4
(s)
OH
-
+ H
+
= H
2
O(l)
None of the previous answers.
8
How should water be written in a net ionic equation?
H
+
+ OH
-
H
2
O(l)
None of the previous answers.
9
How should sulfate be written in a net ionic equation?
S
6+
+ 4 O
2-
SO
4
2-
None of the previous answers.
10
Double replacement reactions go when at least one of the products is: insoluble in water, a gas or a compound that decomposes into a gas (commonly carbonic acid), or a slightly ionized compound (commonly water, ammonia or acetic acid). Which one of the following reactions will not go?
__NaHCO
3
(aq) + __HCl(aq) =
__K
2
CO
3
(aq) + __CaCl
2
(aq) =
__Ba(OH)
2
(aq) + __HNO
3
(aq) =
__CuSO
4
(aq) + __NaOH(aq) =
None of the previous answers.
11
Which one of the following reactions will not go?
__K
2
CO
3
(aq) + __H
2
SO
4
(aq) =
__K
2
SO
4
(aq) + __CuCl
2
(aq) =
__NaOH(aq) + __HBr(aq) =
__Na
2
SO
4
(aq) + __BaCl
2
(aq) =
None of the previous answers.
12
Which one of the following reactions will not go?
__NH
4
Cl(aq) + __NaOH(aq) =
__MgCl
2
(aq) + __NaOH(aq) =
__NaCl(aq) + __AgNO
3
(aq) =
__NaCl(aq) + __H
2
O(l) =
None of the previous answers.
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