Exambusters Chemistry Study Cards 6

Precipitation
Two ionic solutions are mixed, and an insoluble product is formed; a double replacement reaction.
Identify the type of reaction: KI + AgOH ↔ KOH + AgI
double replacement
Identify the type of reaction: FeS ↔ Fe + S
decomposition
Identify the type of reaction: Mg + H2SO4 ↔ H2 + MgSO4
single replacement
Identify the type of reaction: Ca + Br2 ↔ CaBr2
combination
Which elements are gases at room temperature?
H2, N2, O2, F2, Cl2, He, Ne, Ar, Kr, Xe, Rn
Which elements are liquids at room temperature?
Hg, Br
Which elements are solids at room temperature?

All elements but:

gases: H2, N2, O2, F2, Cl2, He, Ne, Ar, Kr, Xe, Rn

Liquids: Hg, Br

List the seven diatomic elements found in nature.
H2, N2, O2, Cl2, F2, Br2, I2

Balance the equation:

____H2 + _______O2 ↔ ________H2O

2,1,2

Balance the equation:

_______Sn + _________O2 ↔ _______SnO2

1,1,1

Balance the equation:

__________H2 + ___________N2 ↔ ___________NH3

3,1,2

Balance the equation:

______NaCl + ______Br2 ↔ _____NaBr + _____Cl2

2,1,2,1
Reactants
starting materials in a chemical reaction
Products
substances formed in a chemical reaction
Write a balanced equation: sulfur and oxygen form sulfur dioxide
S + O2 ↔ SO2

Write a balanced equation:

dinitrogen pentoxide forms nitrogen and oxygen

2N2O5 ↔ 2N2 + 5O2
Synthesis, Combination

A reaction where two or more elements form a compound.

N2 + 3H2 ↔ 2NH3

2H2 + O2 ↔ 2H2O

Single replacement

A reaction involving the replacement in a compound of an element by another element.

Zn + CuCl2 ↔ Cu + ZnCl2

Decomposition

A reaction where a compound breaks down into elements. CO2 ↔ C + O2

2CaO ↔ 2Ca + O2

Double replacement

A reaction where two ionic substances “trade anions.

NaCl + AgNO3 ↔ NaNO3 + AgCl