Questions and Answers
_____ may be changed in order to balance a chemical equation.
coefficients
Chemical equations must be balanced in order to satisfy the law of _____
conservation of mass
A compound plus a compound is the general formula for a _____ reaction.
double replacement
The five basic types of chemical reactions are combination, decomposition, single replacement, double replacement and _____ .
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_____ may not be changed in order to balance a chemical equation.
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A reaction that has only one compound on the reactant side would be classified as a _____ reaction.
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A combustion reaction involves a _____ reacting with oxygen.
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All of the subscripts on the left side of a chemical equation must be transferred to the right side of the chemical equation.
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H₂ N₂ O₂ F₂ Cl₂ Br₂ I₂ are all referred to as _____ molecules.
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A _____ will decompose to form a metal oxide and carbon dioxide.
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What must be added to water to form a metal hydroxide?
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A nonmetal oxide plus water will form a _____.
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Which of the following is not an oxyacid?
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What is the chemical formula of the compound(s) formed when magnesium reacts with nitrogen?
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AlCl₃ + Na₂SO₄ --> _________ + NaCl
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What are the coefficients for the following chemical equation when it is balanced: ___Fe₂O₃ + ___C ---> ___Fe + ___CO₂?
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What are the chemical formulas of the product(s) formed when Na₂O reacts with SO₃?
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The oxyacid H₃PO₄ will decompose to form ________ and water.
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RbO + Al(NO₃)₃ will produce..........
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Write a complete balanced equation for the following; Propene (C₃H₆) combusts...........
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What are the correct coefficients for the following equation when it is balanced? ____ AlBr₃+ ____ K₂SO₄ --> ____ KBr + ____ Al₂(SO₄)₃.
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Complete the following equation and determine the correct coefficients for the balanced equation. ____ Na₃PO₄ + ____ KOH --> ??
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Classify the following reaction: ____ P₄ + ____ O₂ --> ____ P₂O₃.
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Write a complete balanced equation for the decomposition of aluminum carbonate.
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What element will be replaced when iron (II) oxide is reacted with chlorine?
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Study Notes
Chemical Reactions and Definitions
- Coefficients can be adjusted to balance chemical equations while subscripts must remain unchanged.
- The law of conservation of mass requires that chemical equations be balanced to show mass is neither created nor destroyed in reactions.
- Double replacement reactions occur when two compounds react to form two different compounds.
- Combustion is one of the five main types of chemical reactions, alongside combination, decomposition, single replacement, and double replacement.
Types of Reactions
- Decomposition reactions involve a single compound breaking down into two or more products.
- Hydrocarbons are often the reactants in combustion reactions, reacting with oxygen to produce energy.
- Metal carbonates decompose into metal oxides and carbon dioxide when heated.
- Oxyacids form when nonmetal oxides react with water.
Identifying Compounds
- H₂, N₂, O₂, F₂, Cl₂, Br₂, and I₂ are classified as diatomic molecules due to their natural existence as pairs of atoms.
- HBr is not an oxyacid, while HNO₃ and H₂SO₄ are examples of oxyacids.
- Magnesium reacts with nitrogen to form the compound Mg₃N₂.
Chemical Formulas and Balancing
- The reaction of sodium oxide (Na₂O) with sulfur trioxide (SO₃) results in the formation of sodium sulfate (Na₂SO₄).
- The oxyacid H₃PO₄ decomposes to produce P₂O₅ and water.
- Reactions involving RbO and Al(NO₃)₃ produce RbNO₃ and Al₂O₃.
Balancing Chemical Equations
- A balanced equation for the combustion of propene (C₃H₆) is: 2C₃H₆ + 9O₂ → 6CO₂ + 6H₂O.
- The reaction between AlBr₃ and K₂SO₄ can be balanced with coefficients of 2, 3, 6, and 1.
- Sodium phosphate (Na₃PO₄) reacts with potassium hydroxide (KOH) in a reaction that balances to produce 3 NaOH and K₃PO₄.
- A reaction involving P₄ and O₂ to produce P₂O₃ is classified as a combination reaction.
Specific Reactions and Outcomes
- The decomposition of aluminum carbonate (Al₂(CO₃)₃) yields aluminum oxide (Al₂O₃) and carbon dioxide (CO₂).
- In a reaction between iron (II) oxide and chlorine, oxygen will be displaced.
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Description
Test your understanding of chemical reactions, their types, and key definitions in chemistry. This quiz will cover balancing equations, the law of conservation of mass, and various reaction types including decomposition and combustion. Ideal for students studying introductory chemistry.
