Question

practice: predicting products of chemical reactions
use your knowledge of the types of chemical reactions and of bond formation in compounds to complete each reaction below. after, balance the equation, if needed. show all work for balancing on a separate sheet of paper. place coefficient final answers in the blanks provided. you can leave coefficients of 1 blank.
part 1 synthesis reactions

1. 4 na + o₂ →
2. mg + f₂ →
3. na + cl₂ →
4. al + s →
5. ca + p →

part 2 decomposition reactions (hint: oxygen is always o₂ on its own, and metals tend to stand alone.)

1. 2 hgo →
2. 2 al₂o₃ →

part 3 single replacement reactions (hint: like elements always switch!)

1. 2 al + 3 niso₄ → al₂(so₄)₃ + 3ni
2. f₂ + 2 nacl → 2naf + cl₂

part 4 double replacement reactions

1. koh + nacl →
2. bacl₂ + na₃po₄ →
3. agno₃ + cacl₂ →

part 5 combustion reactions

1. ch₄ + o₂ →
2. c₂h₂ + o₂ →
3. c₇h₁₆ + o₂ →

Explanation:

Step1: Recall synthesis reaction rules

Synthesis reactions combine elements to form compounds. For metal - non - metal reactions, we use oxidation states to predict products.

1. $4Na + O_2

ightarrow2Na_2O$

1. $Mg + F_2

ightarrow MgF_2$

1. $2Na+Cl_2

ightarrow2NaCl$

1. $2Al + 3S

ightarrow Al_2S_3$

1. $3Ca + 2P

ightarrow Ca_3P_2$

Step2: Recall decomposition reaction rules

Decomposition reactions break compounds into elements or simpler compounds.

1. $2HgO

ightarrow2Hg + O_2$

1. $2Al_2O_3

ightarrow4Al + 3O_2$

Step3: Recall single - replacement reaction rules

In single - replacement reactions, a more reactive element replaces a less reactive one in a compound.

1. $2Al + 3NiSO_4

ightarrow Al_2(SO_4)_3+3Ni$

1. $F_2 + 2NaCl

ightarrow2NaF+Cl_2$

Step4: Recall double - replacement reaction rules

In double - replacement reactions, the cations and anions of two compounds switch places. For 10, $KOH + NaCl$ no reaction as no precipitate, gas or water is formed.

1. $3BaCl_2 + 2Na_3PO_4

ightarrow Ba_3(PO_4)_2+6NaCl$

1. $2AgNO_3 + CaCl_2

ightarrow2AgCl + Ca(NO_3)_2$

Step5: Recall combustion reaction rules

Hydrocarbon combustion produces carbon dioxide and water.

1. $CH_4 + 2O_2

ightarrow CO_2+2H_2O$

1. $2C_2H_2 + 5O_2

ightarrow4CO_2 + 2H_2O$

1. $C_7H_{16}+11O_2

ightarrow7CO_2 + 8H_2O$

Answer:

1. $4Na + O_2

ightarrow2Na_2O$

1. $Mg + F_2

ightarrow MgF_2$

1. $2Na+Cl_2

ightarrow2NaCl$

1. $2Al + 3S

ightarrow Al_2S_3$

1. $3Ca + 2P

ightarrow Ca_3P_2$

1. $2HgO

ightarrow2Hg + O_2$

1. $2Al_2O_3

ightarrow4Al + 3O_2$

1. $2Al + 3NiSO_4

ightarrow Al_2(SO_4)_3+3Ni$

1. $F_2 + 2NaCl

ightarrow2NaF+Cl_2$

1. No reaction
2. $3BaCl_2 + 2Na_3PO_4

ightarrow Ba_3(PO_4)_2+6NaCl$

1. $2AgNO_3 + CaCl_2

ightarrow2AgCl + Ca(NO_3)_2$

1. $CH_4 + 2O_2

ightarrow CO_2+2H_2O$

1. $2C_2H_2 + 5O_2

ightarrow4CO_2 + 2H_2O$

1. $C_7H_{16}+11O_2

ightarrow7CO_2 + 8H_2O$