Vocabulary
The substance(s) that are present at the start of a reaction.
What is a reactant?
How many oxygen atoms in: Zn(NO3)2
There are six oxygen atoms.
Balance this equation: H2 + O2 ---> H2O
2H2 + O2 ---> 2H2O
AlBr3 +Cl2 --> AlCl3 + Br2
2AlBr3 +3Cl2 --> 2AlCl3 + 3Br2
Chemical equations must be balanced to satisfy the ___________.
What is the Law of Conservation of Mass/Energy?
A concise representation of a chemical reaction.
What is a chemical equation?
How many nitrogen atoms in: 2Zn(NO3)2
There are four nitrogen atoms.
Balance this: N2 + H2 --> NH3
N2 + 3H2 --> 2NH3
Balance H2 + O2 --> H2O
2H2 + O2 --> 2H2O
In every balanced equation, each side has the same number of ______(s).
What is atoms?
A product.
What are the substances produced from a chemical equation?
What is this an example of?
2H2 + O2 --> 2H2O
What is hydrogen combustion?
Balance: Al + H2SO4 --> Al2(SO4)3 + H2
2Al + 3H2SO4 --> Al2(SO4)3 + 3H2
Balance P + O2 --> P2O5
What is 4P + 5O2 --> 2P2O5
A metallic reaction occurs between?
A metal and a metal.
Precipitate
When a solid is formed and settles out of a liquid mixture, the solid is known as a _______.
What is this an example of?
CH4 + 2 O2---> CO2 + 2 H2O
What is methane combustion?
Al + Fe2O3 --> Al2O3 + Fe
2Al + Fe2O3 --> Al2O3 + 2Fe
Balance: NH3 + O2 --> N2 + H2O
4 NH3 + 3 O2 --> 2 N2 + 6 H2O
Why do all elements want to be like the group 18?
Because they are stable.
The arrow in the middle of a chemical equation?
What is a reaction.
List the reactants in this chemical equations.
Na2SO4 + CaCl2 --> CaSO4 + 2NaCl
2 sodium, 1 sulfur, 4 oxygen, 1 calcium, 2 chlorine
Balance: C4H10 + O2 --> H2O +CO2
2C4H10 + 13O2 --> 10H2O + 8CO2
Cr + Fe(NO3)2 --> Fe + Cr(NO3)3
2Cr + 3Fe(NO3)2 --> 3Fe + 2Cr(NO3)3
The three products which, when made, show that a double displacement reaction has gone to completion.
What are: precipitate, gas, water?