Chemistry CCEA AS Level 1.1 (Formulae, equations and amounts of substances)

What is the formula for an ammonium cation?

NH4^+

What is the formula for a nitrate anion?

NO3^-

What is the formula for a nitrite anion?

NO2^-

What is the formula for a carbonate anion?

CO3^2-

What is the formula for a chlorate anion?

ClO3^-

What is the formula for a hydroxide anion?

OH^-

What is the formula for a hydrogencarbonate anion?

HCO3^-

What is the formula for a hypochlorite anion?

ClO^-

What is the formula for a sulphite anion?

SO3^2-

What is the formula for a sulphate anion?

SO4^2-

What is the formula for a thiosulphate anion?

S2O3^2-

What is the formula for a hydrogensulphate anion?

HSO4^-

What is the formula for a phosphate anion?

PO4^3-

What is the formula for a dichromate anion?

Cr2O7^2-

What is the formula for a chromate anion?

CrO4^2-

What is the formula for a permanganate anion?

MnO4^-

What is formed from an acid and a base?

Salt and water

What is formed from an acid and a carbonate?

Water and carbon dioxide

What is formed from an acid and a metal?

Salt and hydrogen

What salts are soluble?

- All nitrates

- All group 1 and ammonium salts

- All chlorides, bromides and iodides (except Ag and Pb)

- Barium Hydroxide

- All hydrogen carbonates

- All sulphates (except Ag, Pb and Ba)

- Group 2 sulphides

What salts are insoluble?

- Ag and Pb salts

- All carbonates, oxides and hydroxides (except Ba(OH)2)

- Ag, Pb and Ba sulphates

- All sulphides (except group 2 sulphides)

What is a mole?

The amount of a substance which contains the Avogadro number of atoms, molecules or groups of ions

What is Avogadro's number?

The number of atoms in 12.000g of carbon-12 isotope (6.023 x 10^23)

What is Relative Atomic Mass (RAM)?

The average mass of one atom of an element relative to 1/12 of the mass of an atom of carbon-12

What is molar mass?

The mass of one mole of a substance

How do you calculate the number of particles in a sample?

Number of particles = moles x avogadro's constant

What is water of crystallisation?

Water which is chemically bonded within a crystal structure

What is a hydrated salt?

One which contains water of crystallisation