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How does one test for halide ions?

Add to the unknown solution dilute nitric acid, then add silver nitrate solution. If Chloride, bromide or iodide ions are present then a white, cream and yellow precipitate will form respectively of silver h...
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Describe one method of producing oxygen gas.

Decomposition of Hydorgen peroxide solution, H 2 O 2 , using Manganese (IV) oxide as a catalyst. Effervescence is observed as the oxygen gas is evolved and the gas can be collected by displacement of water i...
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You are given sets A: {2,4,6,8,10,12} and B: {1,3,5,7,9,11} explain why A∩B = ∅

There are no shared members of either set. Sets A and B are mutually exclusive (odds and evens.) i.e. A intersect B has no members and is empty.
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Answered by Georgiana I. • Maths tutor
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Give the essential conditions of the manufacture of sulfuric acid by the contact process.

-Temperature of 450°C Pressure of 2 atm Vanadium(V)oxide catalyst.
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Write ionic half-equations for the reactions at the electrodes in aluminium extraction.

Al 3+ + 3e - → Al 2O 2- → O 2 + 4e -
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