Flashcards in unit 2 test Deck (21)
what elements are diatomics
H, N, O, F, Cl, Br, I, At.
what state are ionic compounds found in?
always solid, unless in water
what is a combustion reaction
a reaction with a substance (hydrocarbon) and oxygen
what are the reactants of a complete combustion
CO2 + H2O
what are the reactants of a incomplete combustion
H2O, CO, C, CO2
What are the rules to the general solubility guidelines?
Higher guideline takes charge, mind the exceptions though.
What is the rule for halogens in displacement reactions
The highest halogen has all the control. (F can displace everything below it, but Cl can’t displace F) ((does that make sense?)) ((yes it does))
How does the activity series of metals work?
Highest metals have the most power. Second section can displace hydrogen in only acids, whereas first can displace hydrogen in both acids and water.
What order do you balance equations
Leave O and H till the end. Keep polyatomic ions together if they are together in the reaction ( CO3-1, not C-1 and O-3)
Where do most reactions take place?
In an aqueous solution
Things to look for when doing Single Displacement reactions
Activity series- can there even be a reaction.
How can you tell if a Double Displacement reaction has taken place?
A precipitate forms
A gas forms
what gives you water in a double displacement
an acid and a base reacting
what compounds turn to gas and water?
H2SO3 makes SO2 and H2O
H2CO3 makes CO2 and H2O
NH4OH makes NH3 and H2O
what gasses can be formed in a Double Displacement reaction
H2,H2S, SO2, CO2, NH3
what happens when synthesis reactions happen
energy is released
what is required for some decomp reactions?
energy such as heat or electricity
what states are covalent/molecular compounds usually found in?
as a gas (usually)
first section of series of metals
can displace H in all situations
second section of series of metals
can only displace H from acids