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Questions and Answers
What is the general pattern for single displacement reactions?
What is the general pattern for single displacement reactions?
- AB + CD → AC + BD
- A + B → AB
- A + BC → AC + B (correct)
- AB + AC → BC + A
In a double displacement reaction, what is typically exchanged between the reactants?
In a double displacement reaction, what is typically exchanged between the reactants?
- Negatively charged ions only
- Atoms of different elements in the compounds (correct)
- Positive ions only
- Hydrogen ions exclusively
Which factor contributes to the formation of a precipitate in a double displacement reaction?
Which factor contributes to the formation of a precipitate in a double displacement reaction?
- Phase of the reactants involved
- Solubility of ions in water (correct)
- Presence of hydrogen gas
- Temperature of the solution
In a reaction between a metal and an acid, what role does hydrogen play?
In a reaction between a metal and an acid, what role does hydrogen play?
What occurs during a single displacement reaction involving an ionic compound and a metal?
What occurs during a single displacement reaction involving an ionic compound and a metal?
Flashcards
Single Displacement Reaction
Single Displacement Reaction
A reaction where one element replaces another element in a compound.
Single Displacement Reaction: Metal
Single Displacement Reaction: Metal
In a single displacement reaction, if a metal is involved, it will replace the metal in the compound.
Single Displacement Reaction: Non-metal
Single Displacement Reaction: Non-metal
In a single displacement reaction, if a non-metal is involved, it will replace the non-metal in the compound.
Double Displacement reaction
Double Displacement reaction
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Precipitate
Precipitate
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Study Notes
Single Displacement Reactions
- In a single displacement reaction, one element replaces another element in a compound.
- If the reacting element is a metal, it replaces the metal in the compound.
- If the reacting element is a non-metal, it replaces the non-metal in the compound.
- In reactions involving an ionic compound and a metal, the positive ion (cation) is displaced.
- Example: Ca + I₂ → CaI₂ + I₂
- Single displacement reactions frequently happen in aqueous solutions where the polyatomic ions don't break down..
- Reactions can also happen when metals are added to acids. Acids contain hydrogen atoms. Metals displace hydrogen in acids.
- General pattern: A + BC → AC + B
Double Displacement Reactions
- In a double displacement reaction, elements from different compounds swap places.
- Metals replace metals; non-metals replace non-metals
- Metals can replace hydrogen
- Usually involve two ionic compounds in a solution.
- If an insoluble compound forms, it separates as a precipitate.
- Precipitate is a solid in a liquid solution.
- Not all double displacement reactions form precipitates.
- General pattern: AB + CD → AD + CB
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