1.1 Formulae Equations

What is a molecular ion

Two or more atoms covalently bonded with an overall charge

what are all the soluble stuff (aq)

1. All sodium, potasssium and ammonium salts

2. All nitrates

3. most chlorides, bromides and iodides EXCEPT SILVER AND LEAD CHORIDES, BROMIDES AND IODIDES

4. Most sulfate EXCEPT Lead and barium sulfates, calcium sulfate is slightly soluble

All the insoluble stuff

1. Most carbonates EXCEPT sodium, potassium and ammonium carbonates

2. Most hydroxides EXCEPT sodium, potassium and ammonium hydroxides

3. Most oxides EXCEPT sodium, potassium and calcoum oxides which react with watercalcium

Sulfuric acid

H₂SO₄

Hydrochloric acid

HCl

Nitric acid

HNO₃

Metal + acid

Metal + acid → salt + hydrogen

Acid. + alkali/ base →

Acid. + alkali/ base → Salt + water

Acid + metal carbonate →

Acid + metal carbonate → salt + water + carbon dioxide

What is a Mole

A mole is the amount of a substance that contains the Avogadro constant (6.02 × 10,23) number of atoms, molecules or group of ions

What is the Avogadro constant

Avogadro constant is the number of atoms in 12.00 of carbon 12

What is the relative atomic mass

The relative atomic mass is the average mass of an atom of an element relative to one twelfth of the mass of carbon-12

What is the particles formula

Particles = moles x L

What is this moles formula

Moles = mass over RFM

What is the relative molecular mass (RMM)

The average (weighed mean) mass of a molecules relative to one-twelfth of the mass of an atom of carbon-12

What is the relative formula mass (RFM’

the average (weighted mean) mass of a formula unit relative to one-twelfth of the mass of an atom of carbon-12

How to convert grams to kg

Time by 1000

How to convert mg to g

Divide by 1000

What is the water of crystallisation

Water of crystallisation is water that is chemically bonded within a crystal structure.

What does hydrated mean

Hydrated means a salt which contains water of crystallisation

What does anhydrous mean

anhydrous means a salt which contains no water of crystallisation