This question is about some compounds of strontium.
State a test for the strontium cation, giving the expected result.
An unlabelled bottle was thought to contain solid strontium chloride.
A sample of the solid was dissolved in distilled water for tests to identify the anion.
Complete the table to give the expected results of the anion tests.
Reagent added for test | Expected result for the strontium chloride solution |
Barium chloride acidified with hydrochloric acid | .................................................. |
Silver nitrate acidified with nitric acid | .................................................... |
Anhydrous strontium sulfate undergoes thermal decomposition at approximately 1300°C.
SrSO4 (s) → SrO (s) + SO2 (g) + 1⁄2O2 (g)
Suggest why this decomposition is unlikely to be possible in a school laboratory.
Anhydrous strontium nitrate decomposes at 570°C.
Sr(NO3)2 (s) → SrO (s) + 2NO2 (g) + 1⁄2O2 (g)
(1)
Give the test for oxygen and the expected positive result.
(1)
Give one observation for the reaction that takes place, identifying the product of the reaction by name or formula.
(2)
Observation
Product
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