SC9 Calculations involving masses personal learning checklist

GCSE Edexcel Separate Sciences · Chemistry Papers 1 and 2

Name ____________________ Class __________ Date __________

Tick one box per statement. Red: need help. Amber: partly confident. Green: can do independently.

I can	Red	Amber	Green
Formula calculations
Calculate relative formula masses and element mass percentages, including bracketed formulae and appropriate rounding.
Distinguish empirical and molecular formulae and simplify atom ratios.
Calculate empirical formulae from masses or percentages using relative atomic masses.
Calculate molecular formulae using empirical formula and relative molecular mass.
Experimental evidence
Describe the magnesium oxide experiment and calculate magnesium and oxygen masses and the empirical formula.
Explain constant-mass heating and how incomplete reaction or product loss affects experimental results.
Explain mass conservation in closed and open systems, including gas escape and oxygen uptake.
Calculate reacting and product masses from balanced equations and distinguish mass ratios from particle ratios.
Concentration
Calculate and rearrange mass concentration using solution volume and convert between cubic centimetres and cubic decimetres.
Explain dilution using unchanged solute amount and increased solution volume.
Moles (Higher)
Use molar mass to convert between mass and amount in moles (Higher).
Use the Avogadro constant to convert between amount and numbers of specified particles (Higher).
Use balanced mole ratios to calculate reacting quantities and identify limiting reactants (Higher).
Deduce balanced reaction ratios from measured reactant and product masses (Higher).

Next revision priority: __________________________________________________