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Questions and Answers
What is the result of the equation 3*2?
In the balanced equation Fe2O3 + 3CO → 2Fe + 3CO2, the oxidation state of Fe changes.
True
What is the oxidation number of As in the reactant H₃AsO₃?
+3
In the balanced equation 2HNO₃ + 3H₃AsO₃ → 2NO + 3H₃AsO₄ + H₂O, the change in oxidation number for As is ______________.
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Match the following reactions with their types:
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Non-redox reactions are chemical reactions where the oxidation states of chemical elements change.
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What is the purpose of step 5 in balancing a chemical equation?
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Which of the following reactions is a non-redox reaction?
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What is the product of the reaction between hydrochloric acid and calcium carbonate?
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Aluminum reacts with hydrochloric acid to form aluminum chloride and hydrogen gas.
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What is the type of reaction that occurs when silver oxide decomposes to silver and oxygen gas?
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Iron(III) chloride reacts with ammonia to form iron(III) hydroxide and ______________.
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What is the purpose of balancing a chemical equation?
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Starch digestion is a building-up process.
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Match the following reactions with their types:
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What is the final product of protein digestion?
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What type of reaction takes place when an acid reacts with a metal hydroxide?
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In the reaction BaCl2 + Na2SO4 → BaSO4 + 2NaCl, BaSO4 is soluble.
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What is the product of the reaction between sodium carbonate and hydrochloric acid?
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When an active metal reacts with water, a _______________ reaction takes place.
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What type of reaction is 2Cu(NO3)2 → 2CuO + 4NO2 + O2?
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In the reaction CaCO3 + 2HCl → CaCl2 + CO2 + H2O, calcium carbonate is a limiting reactant.
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Match the following reactions with their types:
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Study Notes
Chemical Reactions
- Hydrochloric acid reacts with sodium carbonate to form sodium chloride, water, and carbon dioxide.
- Potassium chlorate, when heated, produces potassium chloride and oxygen.
- Calcium carbonate reacts with hydrochloric acid to form water, carbon dioxide, and calcium chloride.
- Silver oxide decomposes to silver and oxygen gas.
Balancing Chemical Equations
- There are two methods to balance chemical equations: LCM (Lowest Common Multiple) and algebraic methods.
- Examples of balancing equations using LCM method include:
- Al + HCl → AlCl3 + H2
- Fe2(SO4)3 + KOH → K2SO4 + Fe(OH)3
- CaCl2 + Na3PO4 → Ca3(PO4)2 + NaCl
- FeCl3 + NH4OH → Fe(OH)3 + NH4Cl
- Examples of balancing equations using algebraic method include:
- PCl5 + H2O → H3PO4 + HCl
- Mg + H2O → Mg(OH)2 + H2
- Zn(NO3)2 → ZnO + NO2 + O2
- H2SO4 + NaOH → Na2SO4 + H2O
- NH3 + O2 → NO + H2O
- C6H12O6 + O2 → CO2 + H2O
- FeCl3 + MgO → Fe2O3 + MgCl2
- BaCl2 + K3PO4 → Ba3(PO4)2 + 6KCl
- P4O10 + H2O → H3PO4
Types of Chemical Reactions
- There are four types of chemical reactions: combination, decomposition, single displacement, and double displacement reactions.
- Combination reaction: a reaction where two or more substances combine to form a single product.
- Decomposition reaction: a reaction where a single substance breaks down into two or more products.
- Single displacement reaction: a reaction where one element displaces another element from a compound.
- Double displacement reaction: a reaction where two compounds exchange partners, resulting in the formation of two new compounds.
Digestive Protein and Starch
- The final products of digestive protein and starch are amino acids and simple sugars, respectively.
- Protein and starch digestion is a breaking down process.
Oxidation and Reduction Reactions
- Oxidation: a process where an atom, molecule, or ion loses one or more electrons.
- Reduction: a process where an atom, molecule, or ion gains one or more electrons.
- Oxidizing agent: a substance that causes oxidation to occur.
- Reducing agent: a substance that causes reduction to occur.
Balancing Redox Reactions
- The oxidation number change method is used to balance redox reactions.
- Steps to balance redox reactions include:
- Identify the oxidation number of each atom.
- Determine the change in oxidation number for each atom that changes.
- Make the total increase in oxidation number equal to the total decrease in oxidation number.
- Place coefficients in front of the formulas containing the atoms.
Non-Redox Reactions
- Non-redox reactions are chemical reactions where the oxidation states of chemical elements remain unchanged in reactants and products.
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Description
This quiz tests your knowledge of chemical reactions, equations, and balancing methods. It covers various chemical reactions, including acid-base reactions and decomposition reactions, and requires you to balance equations using the LCM method.
