Edexcel IAL Chemistry A2 Translating Data Forms

Edexcel IAL Chemistry A2 Translating Data Forms
Pearson Edexcel International Advanced Subsidiary/Advanced Level in Chemistry, Issue 1, September 2017Chemistry XCH11/YCH11

Practise Edexcel IAL Chemistry translating between data forms by reading graphs, calibration curves and best-fit lines to obtain chemical quantities.

How this is tested

  • Read values from straight-line or calibration graphs, showing construction lines when marks require them.
  • Convert graphical readings into concentrations, ppm values or diluted-sample results using the given scale factors.
  • Use best-fit lines to predict chemical quantities such as ionic radius, percentage ethanol or C=C count.

Question 19(b)(iv)

[Maximum number: 1]

Both butter and margarine are fats used in cooking.

Determine the average number of C=C bonds per molecule of the unknown sample to 2 significant figures, using your graph.