B1 Moles, Formulae + Equations
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Charge of group 1 ions
1+
Charge of group 2 ions
2+
Charge of group 3 ions
3+
Charge of group 5 ions
3-
Charge of group 6 ions
2-
Charge of group 7 ions
1-
Formula and charge of nitrate
Formula and charge of carbonate
Formula and charge of sulfate
Formula and charge of hydroxide
Formula and charge of ammonium
Formula and charge of zinc
Formula and charge of silver
How to write ionic equations
• Write balanced symbol equation • Aqueous compounds split, solid remain unchanged • Remove spectator ions • Cancel down
Define Mole
A unit containing 6.02 x10 (23) particles
Define Avagadro’s constant
The number of particles per mole
Equation for the mass of one atom, using avagadro’s constant
Define Empirical Formula
The simplist whole number ratio of atoms of each element present in a compound
Define Molecular Formula
The number and type of atoms of each element in a molecule
Define Anyhdrous
A compound containing no waters of crystallisation
Define Hydrated
A compound containing waters of crystallisation
How to calculate the empirical formula of a compound/waters of crystallisation
• Calculate moles of each substance in the compound • Find the simplest whole number ratio
Moles equation, with mass
Moles equation, with volume
