A series of chemical problems with key for use in colleges and schools / by T.E. Thorpe. Rev. and enl. by W. Tate ; with a preface by H.E. Roscoe.

  • Thomas Edward Thorpe
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: A series of chemical problems with key for use in colleges and schools / by T.E. Thorpe. Rev. and enl. by W. Tate ; with a preface by H.E. Roscoe. Source: Wellcome Collection.

    60/160 (page 48)
    154. Iron, zinc, and sulpluiric acid diluted so as to contain 20 per cent, of real acid (SO4H0), are supplied to you. Find the amount of these materials required to produce the above quantity of hydrogen, (i) by the action of sulphuric acid upon iron, (2) by the action of sulphuric acid upon zinc. 155. What weight of potassium chlorate is needed to furni.sli oxygen sufficient to burn the hydrogen evolved by the action of water upon 200 grams of sodium ? 156. How many cubic centimetres of oxygen and hydrogen measured at 12° C. and under a pressure of 762 mm. of mercury can be obtained by the electrolysis of 10 grams of water ? 157. 100 grams of steam is passed over 1000 grams of red-hot iron wire. Required the \’olume of hydrogen evolved measured at 10 C. and 742 mm. pressure, and the weight of iron oxide produced. 158- 77 I^er cent, of the weight of the air, freed from moisture and carbonic acid, consists of nitrogen. Calcu- late the weight of (a) metallic copper, and (l>) of plios- ]jhorus required to abstract the oxygen from i lb. of air. 159. Required the weight of ammonia and of chlorine needed to produce a litre of nitrogen. 160. What quantities of nitre and Chili saltpetre respectively will be required to obtain the maximum quantity of nitric acid by reaction with 140 kilos, of 97 per cent, sulphuric acid ? ! 161. How much nitre and sulphuric acid shall I need to prepare nitric acid enough to neutralize exactly 5 lbs. of chalk ? 162. Calculate the volume of nitrogen monoxide at 15° C. and 740 mm. produced on heating 30 grams of ammonium nitrate. 163. What weight of copper is required to yield a litre of nitrogen dioxide at o' C. and 760 mm. ?