Here are the solutions for the chemical reactions listed in your worksheet. I have identified the reaction type and provided the balanced equation for each one.
1. Zinc + Silver Nitrate $\rightarrow$ Silver + Zinc Nitrate
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Type: Single Displacement (SD)
* *Reasoning:* Zinc replaces silver in the compound.
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Balanced Equation:
$$Zn(s) + 2AgNO_3(aq) \rightarrow 2Ag(s) + Zn(NO_3)_2(aq)$$
2. Iron(III) Hydroxide $\rightarrow$ Iron(III) Oxide + Water
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Type: Decomposition (D)
* *Reasoning:* One compound breaks down into two simpler substances.
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Balanced Equation:
$$2Fe(OH)_3(s) \rightarrow Fe_2O_3(s) + 3H_2O(g)$$
3. Ammonia + Sulfuric Acid $\rightarrow$ Ammonium Sulfate
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Type: Synthesis (S)
* *Reasoning:* Two substances combine to form a single new compound.
*
Balanced Equation:
$$2NH_3(g) + H_2SO_4(aq) \rightarrow (NH_4)_2SO_4(aq)$$
4. Magnesium + Nitric Acid $\rightarrow$ Magnesium Nitrate + Hydrogen
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Type: Single Displacement (SD)
* *Reasoning:* Magnesium replaces hydrogen in the acid.
*
Balanced Equation:
$$Mg(s) + 2HNO_3(aq) \rightarrow Mg(NO_3)_2(aq) + H_2(g)$$
5. Calcium Nitrate + Hydrochloric Acid $\rightarrow$ Nitric Acid + Calcium Chloride
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Type: Double Displacement (DD)
* *Reasoning:* The positive ions (calcium and hydrogen) switch partners.
*
Balanced Equation:
$$Ca(NO_3)_2(aq) + 2HCl(aq) \rightarrow 2HNO_3(aq) + CaCl_2(aq)$$
6. Sodium + Water $\rightarrow$ Sodium Hydroxide + Hydrogen
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Type: Single Displacement (SD)
* *Reasoning:* Sodium replaces hydrogen in water.
*
Balanced Equation:
$$2Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2(g)$$
7. Carbon Monoxide + Oxygen $\rightarrow$ Carbon Dioxide
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Type: Combustion (C) (Also fits Synthesis)
* *Reasoning:* A substance reacts with oxygen gas ($O_2$). In many textbooks, reactions involving $O_2$ as a reactant are classified as combustion.
*
Balanced Equation:
$$2CO(g) + O_2(g) \rightarrow 2CO_2(g)$$
8. Iron(II) Sulfide + Hydrochloric Acid $\rightarrow$ Iron(II) Chloride + Hydrogen Sulfide
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Type: Double Displacement (DD)
* *Reasoning:* The iron and hydrogen switch places.
*
Balanced Equation:
$$FeS(s) + 2HCl(aq) \rightarrow FeCl_2(aq) + H_2S(g)$$
Final Answer:
1. SD; $Zn + 2AgNO_3 \rightarrow 2Ag + Zn(NO_3)_2$
2. D; $2Fe(OH)_3 \rightarrow Fe_2O_3 + 3H_2O$
3. S; $2NH_3 + H_2SO_4 \rightarrow (NH_4)_2SO_4$
4. SD; $Mg + 2HNO_3 \rightarrow Mg(NO_3)_2 + H_2$
5. DD; $Ca(NO_3)_2 + 2HCl \rightarrow 2HNO_3 + CaCl_2$
6. SD; $2Na + 2H_2O \rightarrow 2NaOH + H_2$
7. C; $2CO + O_2 \rightarrow 2CO_2$
8. DD; $FeS + 2HCl \rightarrow FeCl_2 + H_2S$
Parent Tip: Review the logic above to help your child master the concept of types of reactions worksheet.
