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Questions and Answers
What is the chemical formula for the ionic compound formed between Aluminum (Al) and Oxygen (O)?
What is the chemical formula for the ionic compound formed between Aluminum (Al) and Oxygen (O)?
- AlO₂
- Al₂O₃ (correct)
- AlO
- Al₂O
In a chemical reaction, the substances that react are called ______, and the substances that are formed are called ______.
In a chemical reaction, the substances that react are called ______, and the substances that are formed are called ______.
reactants, products
Balancing a chemical equation ensures that the number of atoms of each element is the same on both sides of the equation, satisfying the law of conservation of mass.
Balancing a chemical equation ensures that the number of atoms of each element is the same on both sides of the equation, satisfying the law of conservation of mass.
True (A)
Write a balanced chemical equation for the reaction between sodium (Na) and chlorine gas (Cl₂) to produce sodium chloride (NaCl).
Write a balanced chemical equation for the reaction between sodium (Na) and chlorine gas (Cl₂) to produce sodium chloride (NaCl).
Which of the following is a correctly balanced chemical equation?
Which of the following is a correctly balanced chemical equation?
The element located in Group 17 (VIIA) of the periodic table are known as ______.
The element located in Group 17 (VIIA) of the periodic table are known as ______.
Match the following elements with their correct group number on the periodic table:
Match the following elements with their correct group number on the periodic table:
What is the expected ionic charge of an ion formed from sulfur (S)?
What is the expected ionic charge of an ion formed from sulfur (S)?
Noble gases are highly reactive due to their full valence electron shells.
Noble gases are highly reactive due to their full valence electron shells.
Write a balanced chemical equation, including state symbols, for the reaction of aqueous silver nitrate (AgNO₃) with aqueous sodium chloride (NaCl) to form solid silver chloride (AgCl) and aqueous sodium nitrate (NaNO₃).
Write a balanced chemical equation, including state symbols, for the reaction of aqueous silver nitrate (AgNO₃) with aqueous sodium chloride (NaCl) to form solid silver chloride (AgCl) and aqueous sodium nitrate (NaNO₃).
If element X, found in Group 2, reacts with element Y, found in Group 17, what is most likely the chemical formula of the resulting compound?
If element X, found in Group 2, reacts with element Y, found in Group 17, what is most likely the chemical formula of the resulting compound?
Write a balanced chemical equation, including state symbols, for the reaction between aqueous solutions of lead(II) nitrate and potassium iodide, which forms a precipitate of lead(II) iodide and aqueous potassium nitrate.
Write a balanced chemical equation, including state symbols, for the reaction between aqueous solutions of lead(II) nitrate and potassium iodide, which forms a precipitate of lead(II) iodide and aqueous potassium nitrate.
The reaction of sodium with water is an endothermic reaction.
The reaction of sodium with water is an endothermic reaction.
Which of the following statements correctly describes the trend in atomic radius across Period 3 (Na to Cl) of the periodic table?
Which of the following statements correctly describes the trend in atomic radius across Period 3 (Na to Cl) of the periodic table?
When chlorine gas reacts with a solution of potassium bromide, the products are potassium chloride and ______.
When chlorine gas reacts with a solution of potassium bromide, the products are potassium chloride and ______.
Element A has an electronic configuration of 2,8,6. Element B has an electronic configuration of 2,8,1. What type of bond is most likely formed between A and B, and what is the resulting compound's formula?
Element A has an electronic configuration of 2,8,6. Element B has an electronic configuration of 2,8,1. What type of bond is most likely formed between A and B, and what is the resulting compound's formula?
Match the following elements with their common ionic charge:
Match the following elements with their common ionic charge:
Write a balanced chemical equation for the complete combustion of butane (C₄H₁₀).
Write a balanced chemical equation for the complete combustion of butane (C₄H₁₀).
Which of the following is NOT a characteristic property of alkali metals?
Which of the following is NOT a characteristic property of alkali metals?
In a displacement reaction, a more ______ halogen will displace a less reactive halogen from its salt.
In a displacement reaction, a more ______ halogen will displace a less reactive halogen from its salt.
Flashcards
Chemical Equation
Chemical Equation
Representation of a chemical reaction using symbols and formulas.
Worded Equation
Worded Equation
A chemical equation using words instead of chemical formulas to describe a reaction.
Cross Over Method
Cross Over Method
A method used to write chemical formulas for ionic compounds.
Combustion Reaction
Combustion Reaction
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Synthesis Reaction
Synthesis Reaction
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Decomposition Reaction
Decomposition Reaction
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Single Displacement Reaction
Single Displacement Reaction
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Double Displacement Reaction
Double Displacement Reaction
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Balanced Chemical Equation
Balanced Chemical Equation
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Hydrocarbon Combustion
Hydrocarbon Combustion
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Ionic Formula Prediction
Ionic Formula Prediction
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Chemical Equation with State Symbols
Chemical Equation with State Symbols
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Neutralization Reaction
Neutralization Reaction
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Metal Oxidation
Metal Oxidation
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Balancing Word Equations
Balancing Word Equations
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Study Notes
- Chemical equations show how reactants turn into products during a chemical reaction.
- Worded equations describe chemical reactions using the names of the substances involved.
Balancing Equations
- Balancing ensures there are equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.
- To balance, place coefficients in front of the chemical formulas to adjust the number of molecules until the equation is balanced.
- E.g., to balance H₂ + O₂ → H₂O, adjust to 2H₂ + O₂ → 2H₂O.
Crossover Method
- The crossover method is used to write chemical formulas for ionic compounds.
- Write the symbols of the two ions involved.
- Determine the charge of each ion.
- Cross over the numbers of the charges (without the sign) so that they become the subscripts for the other ion.
- Simplify the subscripts if possible to obtain the empirical formula.
- E.g., combining Aluminum (Al³⁺) and Oxygen (O²⁻) ions gives Al₂O₃.
Chemical Reactions
- A chemical reaction is a process that involves the rearrangement of atoms and molecules to form new substances.
- Reactants are the substances that start a chemical reaction.
- Products are the substances that are formed as a result of a chemical reaction.
- Several types of chemical equations exist including synthesis, decomposition, single replacement, and double replacement reactions.
Chemical Equations
- Synthesis (Combination): Two or more reactants combine to form a single product (A + B → AB).
- Decomposition: A single reactant breaks down into two or more products (AB → A + B).
- Single Replacement: One element replaces another element in a compound (A + BC → AC + B).
- Double Replacement: The positive ions of two compounds switch places (AB + CD → AD + CB).
- Combustion: A substance reacts rapidly with oxygen, producing heat and light (CxHy + O₂ → CO₂ + H₂O).
Example Chemical Equation
- Consider the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH).
- The balanced chemical equation is HCl + NaOH → NaCl + H₂O.
- The worded equation is Hydrochloric acid plus Sodium hydroxide yields Sodium chloride plus Water.
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