Edexcel GCSE Biology · 1BI0
Specification 1.17 · Paper 1, Paper 2
Revise: Osmosis CalculationsIf the final mass is greater than the initial mass, the numerator is positive. The positive percentage represents a gain in mass.
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GCSE Biology · key term
The mass of a sample after it has spent the stated time in the test solution.
Used by Edexcel
Specification 1.17 · Paper 1, Paper 2
Revise: Osmosis CalculationsIf the final mass is greater than the initial mass, the numerator is positive. The positive percentage represents a gain in mass.
Always divide by the initial mass, not the final mass.
Enter the subtraction in brackets on a calculator before dividing: (final mass − initial mass) ÷ initial mass × 100.
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