Here are the solutions to the chemical reaction problems. I have predicted the products, balanced the equations, and classified them as requested.
1. magnesium bromide + chlorine
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Reaction: $MgBr_2 + Cl_2 \rightarrow MgCl_2 + Br_2$
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Type: Single Replacement
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State: No precipitate forms (Bromine is a liquid).
2. aluminum + iron (III) oxide
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Reaction: $2Al + Fe_2O_3 \rightarrow Al_2O_3 + 2Fe$
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Type: Single Replacement
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State: No precipitate forms (Iron is a solid metal product, not an insoluble salt in water).
3. silver nitrate + zinc chloride
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Reaction: $2AgNO_3 + ZnCl_2 \rightarrow 2AgCl(s) + Zn(NO_3)_2$
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Type: Double Replacement
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State: Precipitate formed: AgCl (s) (Silver chloride is insoluble).
4. cobalt(II) carbonate
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Reaction: $CoCO_3 \rightarrow CoO + CO_2$
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Type: Decomposition
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State: No precipitate (Gas is released).
5. zinc + hydrochloric acid
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Reaction: $Zn + 2HCl \rightarrow ZnCl_2 + H_2$
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Type: Single Replacement
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State: No precipitate (Hydrogen gas is released).
6. sulfuric acid + sodium hydroxide
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Reaction: $H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O$
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Type: Double Replacement (Neutralization)
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State: No precipitate (Water is a liquid, Sodium sulfate is soluble).
7. aluminum + oxygen
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Reaction: $4Al + 3O_2 \rightarrow 2Al_2O_3$
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Type: Synthesis
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State: No precipitate (Solid oxide forms directly from elements).
8. acetic acid + copper
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Reaction: N.R.
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Reason: Copper is below Hydrogen on the activity series, so it cannot replace hydrogen in the acid.
9. potassium chlorate
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Reaction: $2KClO_3 \rightarrow 2KCl + 3O_2$
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Type: Decomposition
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State: No precipitate (Gas is released).
10. calcium oxide + water
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Reaction: $CaO + H_2O \rightarrow Ca(OH)_2$
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Type: Synthesis
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State: No precipitate (Calcium hydroxide is slightly soluble, usually forming limewater).
11. nonane ($C_9H_{20}$) + oxygen gas
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Reaction: $C_9H_{20} + 14O_2 \rightarrow 9CO_2 + 10H_2O$
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Type: Combustion
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State: No precipitate (Gases and water vapor form).
12. zinc nitrate + potassium iodide
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Reaction: $Zn(NO_3)_2 + 2KI \rightarrow ZnI_2 + 2KNO_3$
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Type: Double Replacement
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State: N.R. (No Reaction / No Precipitate). According to solubility rules, both potential products (Zinc Iodide and Potassium Nitrate) are soluble in water.
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Final Answer:
1. $MgBr_2 + Cl_2 \rightarrow MgCl_2 + Br_2$
2. $2Al + Fe_2O_3 \rightarrow Al_2O_3 + 2Fe$
3. $2AgNO_3 + ZnCl_2 \rightarrow 2AgCl(s) + Zn(NO_3)_2$
(a) AgCl
4. $CoCO_3 \rightarrow CoO + CO_2$
5. $Zn + 2HCl \rightarrow ZnCl_2 + H_2$
6. $H_2SO_4 + 2NaOH \rightarrow Na_2SO_4 + 2H_2O$
7. $4Al + 3O_2 \rightarrow 2Al_2O_3$
8. N.R.
9. $2KClO_3 \rightarrow 2KCl + 3O_2$
10. $CaO + H_2O \rightarrow Ca(OH)_2$
11. $C_9H_{20} + 14O_2 \rightarrow 9CO_2 + 10H_2O$
12. N.R.
Parent Tip: Review the logic above to help your child master the concept of predicting products of chemical reactions worksheet answers.
