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Edexcel A-Level Chemistry AS 8.17 The Formation of Characteristic Flame Colours By Group 1 And 2 Compounds in Terms of Electron Transitions Students Will Be Questions

Practise Edexcel IAL Chemistry 8.17 by identifying Group 1 and 2 ions from flame colours, explaining emission and describing a clean flame test.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Identify Group 1 or 2 cations from their exact accepted flame-test colours.
  • Explain flame colour through excitation followed by emission during a downward transition.
  • Describe a clean flame-test method using hydrochloric acid and a non-luminous flame.

Edexcel A-Level Chemistry AS 8.17 The Formation of Characteristic Flame Colours By Group 1 And 2 Compounds in Terms of Electron Transitions Students Will Be Questions question 1

[Maximum number: 1]

This question is about the element calcium and some of its compounds.

Calcium reacts with chlorine to form calcium chloride.

Ca( s)+Cl2( g)→CaCl2( s)\mathrm{Ca}(\mathrm{~s})+\mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{CaCl}_{2}(\mathrm{~s})

State the expected flame colour when CaCl2\mathrm{CaCl}_{2} is used in a flame test.

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