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The Pamphlet Collection of Sir Robert Stout: Volume 50

University of New Zealand — Chemistry. — Paper a

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University of New Zealand


Paper a.


Describe the materials and apparatus to be employed in making ordinary strong solution of ammonia.

How would you proceed to ascertain the quantity of ammonia in a given sample of the solution?


What proportion of carbon dioxide is commonly to be found in atmospheric air, how does it get there, and what are the chief geological and physiological functions of carbonic acid in nature?


What do you understand by the "Atomic Theory"?

Protoxide of tin contains 88.1 per cent, of tin to 11.9 of oxygen, whilst the peroxide contains 78.7 per cent, of tin and 21.3 of oxygen. Illustrate the law of multiple proportions by this example and explain it by the Atomic Theory.


How is potassium chlorate manufactured?

page 2

Describe the properties of the following sulphides:—FeS, FeS2, Sb2S3, HgS.


A colourless solution gives with hydrogen sulphide a dark brown precipitate. This precipitate dissolves in yellow sulphide of ammonium, and on adding to this solution excess of hydrochloric acid, a dull yellow precipitate is thrown down; what metal was present in the original solution?


How many tons of pyrites containing 48 per cent, of sulphur would be theoretically required to produce the sulphuric acid necessary to make 10 tons of ammonium sulphate?