Chem study guide

What is the name of CaCO₃?

Calcium carbonate

What is the name of NH₃?

Ammonia

Balance: CaCO₃ → CaO + CO₂

1, 1, 1

What type of reaction is CaCO₃ → CaO + CO₂?

Decomposition

What is the % composition of carbon in CaCO₃?

12%

Draw NH₃: what is its shape?

Trigonal pyramidal

NH₃ polarity is:

Polar

Balance: N₂ + H₂ → NH₃

1, 3, 2

What type of reaction is N₂ + H₂ → NH₃?

Synthesis

Which IMFs are present in NH₃?

London dispersion, dipole-dipole, hydrogen bonding

Which IMF is strongest in NH₃?

Hydrogen bonding

What is the name of Al₂O₃?

Aluminum oxide

Balance: Al + O₂ → Al₂O₃

4, 3, 2

What type of reaction is Al + O₂ → Al₂O₃?

Synthesis

What is the % oxygen in Al₂O₃?

47%

What is the name of Fe₃(PO₄)₂?

Iron (II) phosphate

Why use Roman numerals in Fe₃(PO₄)₂?

To show the charge of the metal

Balance: FeCl₂ + Na₃PO₄ → Fe₃(PO₄)₂ + NaCl

3, 2, 1, 6

What type of reaction is above?

Double replacement

What is % phosphorus in Fe₃(PO₄)₂?

28%

What is the name of CO₂?

Carbon dioxide

CO₂ shape is:

Linear

CO₂ polarity is:

Nonpolar

Balance: C₃H₈ + O₂ → CO₂ + H₂O

1, 5, 3, 4

Reaction type above:

Combustion

Which IMFs are in CO₂?

London dispersion forces

What is the name of CuO?

Copper (II) oxide

Why use Roman numerals in CuO?

Copper has multiple charges

Balance: Cu + O₂ → CuO

2, 1, 2

What type of reaction is above?

Synthesis

What is % copper in CuO?

80%

What makes a molecule polar?

Unequal sharing of electrons

Why balance equations?

To obey conservation of mass

Which IMF is in all molecules?

London dispersion forces

What defines synthesis?

Two or more reactants combine

Why does water have a high boiling point?

Hydrogen bonding

How does conservation of mass apply?

Atoms must be equal on both sides

Strongest IMF in HCl?

Dipole-dipole

Why is CO₂ linear?

No lone pairs on carbon

Double replacement means:

Two compounds exchange ions

Percent composition finds:

Mass ratios of elements

London dispersion forces are caused by:

Temporary electron movement

Why must ionic compounds be neutral?

Total charges must balance

Combustion is:

Hydrocarbon + oxygen reaction

Why is NH₃ pyramidal?

Lone pair on nitrogen

Hydrogen bonding is:

A type of dipole-dipole interaction

What is the formula for cobalt (II) sulfate?

CoSO₄

What is the chemical name for CuCl₂?

Copper (II) chloride

What is the % of carbon in C₆H₁₂O₆?

40.0%

Identify the reaction type: 2Al + 3CuCl₂ → 2AlCl₃ + 3Cu

Single replacement

Balance: Na + H₂O → NaOH + H₂

2, 2, 2, 1

Strongest IMF in CH₄:

London dispersion forces

Which is a polar molecule?

NH₃

What is the formula for magnesium nitrate?

Mg(NO₃)₂

Balance: C₂H₆ + O₂ → CO₂ + H₂O

2, 7, 4, 6

Identify the reaction type: CaCO₃ → CaO + CO₂

Decomposition

What is the % composition of oxygen in H₂SO₄?

65.3%

What is the name for P₂O₅?

Diphosphorus pentoxide

What is the shape of H₂S?

Bent

What is the shape of NH₃?

Trigonal pyramidal

Balance: Fe + O₂ → Fe₂O₃

4, 3, 2