18. classify each reaction below using one of the 5 reaction types: synthesis (s), decomposition (d), single replacement (sr), double replacement (dr), or combustion (c).
a. ______ $2\ ag(no_3) + ba(so_4) \
ightarrow ag_2(so_4) + ba(no_3)_2$
b. ______ $2\ nh_3 + h_2so_4 \
ightarrow (nh_4)_2(so_4)$
c. ______ $2\ pb(so_4) \
ightarrow 2\ pb(so_3) + o_2$
d. ______ $c_4h_8 + 6\ o_2 \
ightarrow 4\ co_2 + 4\ h_2o$
e. ______ $li(no_3) + ag \
ightarrow ag(no_3) + li$
f. ______ $mgcl_2 + li_2(co_3) \
ightarrow mg(co_3) + 2\ licl$
g. ______ $p_4 + 3\ o_2 \
ightarrow 2\ p_2o_3$

19. a student has classified the following reaction as a combustion reaction. provide a justification for why this is the correct justification.
$c_6h_{12}(l) + 9\ o_2(g) \
ightarrow 6\ co_2(g) + 6\ h_2o(g)$

20. a student has classified the following reaction as a single replacement reaction. provide a justification for why this is the correct justification.
$2\ ag(no_3)(aq) + cu(s) \
ightarrow cu(no_3)_2(aq) + 2\ ag(s)$

21. write a word equation to represent each chemical equation below. make sure to include coefficients and indicate states of matter.
$4\ al(s) + 3\ o_2(g) \
ightarrow 2\ al_2o_3(s)$
word equation:
____________________

22. write a word equation to represent each chemical equation below. make sure to include coefficients and indicate states of matter.
$fe_2o_3(s) + 3\ co(g) \
ightarrow 2\ fe(s) + 3\ co_2(g)$
word equation:
____________________

Question

18. classify each reaction below using one of the 5 reaction types: synthesis (s), decomposition (d), single replacement (sr), double replacement (dr), or combustion (c).
a. ______ $2\ ag(no_3) + ba(so_4) \
ightarrow ag_2(so_4) + ba(no_3)_2$
b. ______ $2\ nh_3 + h_2so_4 \
ightarrow (nh_4)_2(so_4)$
c. ______ $2\ pb(so_4) \
ightarrow 2\ pb(so_3) + o_2$
d. ______ $c_4h_8 + 6\ o_2 \
ightarrow 4\ co_2 + 4\ h_2o$
e. ______ $li(no_3) + ag \
ightarrow ag(no_3) + li$
f. ______ $mgcl_2 + li_2(co_3) \
ightarrow mg(co_3) + 2\ licl$
g. ______ $p_4 + 3\ o_2 \
ightarrow 2\ p_2o_3$

19. a student has classified the following reaction as a combustion reaction. provide a justification for why this is the correct justification.
$c_6h_{12}(l) + 9\ o_2(g) \
ightarrow 6\ co_2(g) + 6\ h_2o(g)$

20. a student has classified the following reaction as a single replacement reaction. provide a justification for why this is the correct justification.
$2\ ag(no_3)(aq) + cu(s) \
ightarrow cu(no_3)_2(aq) + 2\ ag(s)$

21. write a word equation to represent each chemical equation below. make sure to include coefficients and indicate states of matter.
$4\ al(s) + 3\ o_2(g) \
ightarrow 2\ al_2o_3(s)$
word equation:
____________________

22. write a word equation to represent each chemical equation below. make sure to include coefficients and indicate states of matter.
$fe_2o_3(s) + 3\ co(g) \
ightarrow 2\ fe(s) + 3\ co_2(g)$
word equation:
____________________

Accepted Answer

### Question 18 (a to n)
#### Part a
# Explanation:
## Step1: Identify reaction type
In the reaction $ 2Ag(NO_3) + Ba(SO_4)
ightarrow Ag_2(SO_4) + Ba(NO_3)_2 $, the cations ($Ag^+$ and $Ba^{2+}$) and anions ($NO_3^-$ and $SO_4^{2-}$) are exchanged between the two compounds. This fits the definition of a double replacement (DR) reaction.
# Answer: DR

#### Part b
# Explanation:
## Step1: Identify reaction type
The reaction $ 2NH_3 + H_2SO_4
ightarrow (NH_4)_2(SO_4) $ involves two substances combining to form a single product. This is a synthesis (S) reaction.
# Answer: S

#### Part c
# Explanation:
## Step1: Identify reaction type
In $ 2Pb(SO_4)
ightarrow 2Pb(SO_3) + O_2 $, a single compound breaks down into two or more products. This is a decomposition (D) reaction.
# Answer: D

#### Part d
# Explanation:
## Step1: Identify reaction type
The reaction $ C_4H_8 + 6O_2
ightarrow 4CO_2 + 4H_2O $ involves a hydrocarbon reacting with oxygen to produce carbon dioxide and water, which is characteristic of a combustion (C) reaction.
# Answer: C

#### Part e
# Explanation:
## Step1: Identify reaction type
In $ Li(NO_3) + Ag
ightarrow Ag(NO_3) + Li $, one element (Ag) replaces another element (Li) in a compound. This is a single replacement (SR) reaction.
# Answer: SR

#### Part f
# Explanation:
## Step1: Identify reaction type
The reaction $ MgCl_2 + Li_2(CO_3)
ightarrow Mg(CO_3) + 2LiCl $ shows the exchange of cations ($Mg^{2+}$ and $Li^+$) and anions ($Cl^-$ and $CO_3^{2-}$) between the two compounds, so it is a double replacement (DR) reaction.
# Answer: DR

#### Part n
# Explanation:
## Step1: Identify reaction type
The reaction $ P_4 + 3O_2
ightarrow 2P_2O_3 $ involves two substances combining to form a single product, so it is a synthesis (S) reaction.
# Answer: S

### Question 19
# Brief Explanations:
A combustion reaction is defined as a reaction where a substance (usually a hydrocarbon) reacts with oxygen ($O_2$) to produce carbon dioxide ($CO_2$) and water ($H_2O$) (and often energy). In the reaction $ C_6H_{12}(l) + 9O_2(g)
ightarrow 6CO_2(g) + 6H_2O(g) $, the reactants are a hydrocarbon ($C_6H_{12}$) and oxygen ($O_2$), and the products are carbon dioxide and water, which matches the definition of a combustion reaction.
# Answer: The reaction is a combustion reaction because a hydrocarbon ($C_6H_{12}$) reacts with oxygen ($O_2$) to produce carbon dioxide ($CO_2$) and water ($H_2O$), which is the characteristic of a combustion reaction.

### Question 20
# Brief Explanations:
A single replacement reaction is a reaction where one element replaces another element in a compound. In the reaction $ 2Ag(NO_3)(aq) + Cu(s)
ightarrow Cu(NO_3)_2(aq) + 2Ag(s) $, the element copper (Cu) replaces the element silver (Ag) in the silver nitrate ($Ag(NO_3)$) compound, which fits the definition of a single replacement reaction.
# Answer: The reaction is a single replacement reaction because copper (Cu) replaces silver (Ag) in the silver nitrate ($Ag(NO_3)$) compound.

### Question 21
# Brief Explanations:
To write the word equation, we convert the chemical formulas to their corresponding names, include the coefficients, and indicate the states of matter. Aluminum (Al) is solid, oxygen ($O_2$) is gas, and aluminum oxide ($Al_2O_3$) is solid.
# Answer: Four solid aluminum reacts with three gaseous oxygen to produce two solid aluminum oxide. (Or more precisely: Four moles of solid aluminum react with three moles of gaseous oxygen to produce two moles of solid aluminum oxide.)

### Question 22
# Brief Explanations:
For the word equation, we convert the chemical formulas to names, include coefficients, and indicate states. Iron(III) oxide ($Fe_2O_3$) is solid, carbon monoxide (CO) is gas, iron (Fe) is solid, and carbon dioxide ($CO_2$) is gas.
# Answer: One solid iron(III) oxide reacts with three gaseous carbon monoxide to produce two solid iron and three gaseous carbon dioxide. (Or more precisely: One mole of solid iron(III) oxide reacts with three moles of gaseous carbon monoxide to produce two moles of solid iron and three moles of gaseous carbon dioxide.)

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QUESTION IMAGE

Question

Explanation:

Question 18 (a to n)

Part a

Step1: Identify reaction type

Step1: Identify reaction type

Step1: Identify reaction type

Answer:

Part b