Double Displacement Reactions Flashcards
What is one way to remove unwanted ions?
to make them form a precipitate from the solution.
What is the general formula for a double displacement reaction?
AD + BC →AC + BD
define a double displacement reaction
two compounds switch parts to make two new compounds
What state must the two elements be in for a double displacement reaction to occur?
aqeous.
Double displacement reactions will only happen when…
one of the products:
- doesn’t dissolve in water and form a solid (precipitate)
- is a gas that bubbles out
- is a molecular compound (usually water)
What must be true for a precipitate to form?
a compound must be only slightly soluble
What is a solution?
homogenous mixture of a solute dissolved in a solvent
what is a solute?
the substance that dissolves in the solvent
what is the solvent?
the substance that dissolves the solute
What is solubility?
the quantity of solute that dissolves in a given quantity of solvent at a given temperature
What does the solubility of a solute depend on?
- type of bonding within the solute
- the states of both substances
- the temperature of the solvent
All substances dissolve inw ater to some degree so they can either be ___________ or ___________. (fill in the blank)
very soluble, slightly soluble
What happens when an ionic compound dissolves in water?
the compound dissassociates - it breaks apart into cations and anions
What happens when a covalent compound dissolves in water?
the molecules simply disperse, they do not disassociate , due to attraction with polar water molecules
What are ions that do not participate in the reaction called?
spectator ions
