Precipitation, Decomposition, and Displacement Reactions Flashcards
(25 cards)
What is a precipitation reaction?
A reaction that occurs when two solutions are mixed and an insoluble solid forms.
True or False: In a decomposition reaction, a single compound breaks down into two or more simpler substances.
True
Fill in the blank: A common method to drive a decomposition reaction is by applying ______.
heat
What is the general equation for a precipitation reaction?
AB(aq) + CD(aq) → AD(s) + CB(aq)
What is a displacement reaction?
A reaction where an element displaces another element in a compound.
True or False: In a displacement reaction, a more reactive metal can displace a less reactive metal from its compound.
True
What type of reaction is represented by the equation: 2H₂O → 2H₂ + O₂?
Decomposition reaction
Identify the products of the precipitation reaction between silver nitrate and sodium chloride.
Silver chloride (AgCl) and sodium nitrate (NaNO₃)
What is the term for the solid that forms in a precipitation reaction?
Precipitate
Fill in the blank: In a displacement reaction, the more reactive element takes the place of the ______ element in a compound.
less reactive
What is the general formula for a displacement reaction?
A + BC → AC + B
True or False: Decomposition reactions can only occur with the application of heat.
False
What is the main driving force behind a precipitation reaction?
The formation of an insoluble product.
Name one example of a decomposition reaction.
The thermal decomposition of calcium carbonate into calcium oxide and carbon dioxide.
What is the role of heat in decomposition reactions?
It provides the energy needed to break down compounds into simpler substances.
What happens in a double displacement reaction?
The cations and anions of two different compounds exchange places.
True or False: A single displacement reaction requires two reactants.
True
What is a common example of a precipitation reaction?
Mixing lead(II) nitrate with potassium iodide to form lead(II) iodide.
In a displacement reaction, what determines if a reaction will occur?
The reactivity of the elements involved.
What is the result of heating ammonium dichromate?
It decomposes into chromium(III) oxide, nitrogen gas, and water vapor.
Fill in the blank: The process of a solid forming from a solution is called ______.
precipitation
What type of reaction is represented by the equation: Zn + CuSO₄ → ZnSO₄ + Cu?
Displacement reaction
What are the two main types of reactions discussed in NCEA Level 1 chemistry?
Precipitation reactions and decomposition reactions.
True or False: All decomposition reactions require a catalyst.
False
