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Questions and Answers
What is the result of the equation 3*2?
What is the result of the equation 3*2?
- 6 (correct)
- 8
- 9
- 4
In the balanced equation Fe2O3 + 3CO → 2Fe + 3CO2, the oxidation state of Fe changes.
In the balanced equation Fe2O3 + 3CO → 2Fe + 3CO2, the oxidation state of Fe changes.
True (A)
What is the oxidation number of As in the reactant H₃AsO₃?
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 ______________.
In the balanced equation 2HNO₃ + 3H₃AsO₃ → 2NO + 3H₃AsO₄ + H₂O, the change in oxidation number for As is ______________.
Match the following reactions with their types:
Match the following reactions with their types:
Non-redox reactions are chemical reactions where the oxidation states of chemical elements change.
Non-redox reactions are chemical reactions where the oxidation states of chemical elements change.
What is the purpose of step 5 in balancing a chemical equation?
What is the purpose of step 5 in balancing a chemical equation?
Which of the following reactions is a non-redox reaction?
Which of the following reactions is a non-redox reaction?
What is the product of the reaction between hydrochloric acid and calcium carbonate?
What is the product of the reaction between hydrochloric acid and calcium carbonate?
Aluminum reacts with hydrochloric acid to form aluminum chloride and hydrogen gas.
Aluminum reacts with hydrochloric acid to form aluminum chloride and hydrogen gas.
What is the type of reaction that occurs when silver oxide decomposes to silver and oxygen gas?
What is the type of reaction that occurs when silver oxide decomposes to silver and oxygen gas?
Iron(III) chloride reacts with ammonia to form iron(III) hydroxide and ______________.
Iron(III) chloride reacts with ammonia to form iron(III) hydroxide and ______________.
What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
Starch digestion is a building-up process.
Starch digestion is a building-up process.
Match the following reactions with their types:
Match the following reactions with their types:
What is the final product of protein digestion?
What is the final product of protein digestion?
What type of reaction takes place when an acid reacts with a metal hydroxide?
What type of reaction takes place when an acid reacts with a metal hydroxide?
In the reaction BaCl2 + Na2SO4 → BaSO4 + 2NaCl, BaSO4 is soluble.
In the reaction BaCl2 + Na2SO4 → BaSO4 + 2NaCl, BaSO4 is soluble.
What is the product of the reaction between sodium carbonate and hydrochloric acid?
What is the product of the reaction between sodium carbonate and hydrochloric acid?
When an active metal reacts with water, a _______________ reaction takes place.
When an active metal reacts with water, a _______________ reaction takes place.
What type of reaction is 2Cu(NO3)2 → 2CuO + 4NO2 + O2?
What type of reaction is 2Cu(NO3)2 → 2CuO + 4NO2 + O2?
In the reaction CaCO3 + 2HCl → CaCl2 + CO2 + H2O, calcium carbonate is a limiting reactant.
In the reaction CaCO3 + 2HCl → CaCl2 + CO2 + H2O, calcium carbonate is a limiting reactant.
Match the following reactions with their types:
Match the following reactions with their types:
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.
