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CAIE A-Level Chemistry 10.1.3 Group 2 Thermal Decomposition

Practise writing Group 2 nitrate and carbonate decomposition equations and applying the thermal-stability trend.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • write MCO3 → MO + CO2 and identify the oxide and carbon dioxide products
  • write nitrate decomposition to MO, NO2 and O2 with balanced integer or accepted fractional coefficients
  • state that thermal stability increases down Group 2 and predict the relative heating required

10.1.3—Thermal decomposition trends question 1

[Maximum number: 1]

Nitrogen and phosphorus are elements in Group 15 of the Periodic Table.

Nitrogen is found in inorganic compounds such as nitrogen oxides ( NOx\mathrm{NO}_{x} ), nitrates and nitric acid.

Describe what is seen when solid calcium nitrate is heated strongly.

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