An introduction to practical chemistry : including analysis . quid to be filtered, using a glass rod to conduct it(Fig. 23), (636). When most of the liquid has passed through, thewhite powTder may be detached with a knife from the Fig. paper, and introduced into a test-tube ; the clear solu-tion being reserved for examination (68). 67. (a.) Add a few drops of dilute nitric acid to thepowrder in the tube, and observe that it dissolves witheffervescence, indicating that it is a carbonate (419). (b.) Supersaturate the solution thus obtained withammonia, and add a little oxalate of ammonia (N
An introduction to practical chemistry : including analysis . quid to be filtered, using a glass rod to conduct it(Fig. 23), (636). When most of the liquid has passed through, thewhite powTder may be detached with a knife from the Fig. paper, and introduced into a test-tube ; the clear solu-tion being reserved for examination (68). 67. (a.) Add a few drops of dilute nitric acid to thepowrder in the tube, and observe that it dissolves witheffervescence, indicating that it is a carbonate (419). (b.) Supersaturate the solution thus obtained withammonia, and add a little oxalate of ammonia (NHfl,<7203): a white precipitate shows the presence of lime(218). The powTder is thus proved to be carbonate oflime (CaO,C02). This carbonate of lime had been heldin solution by the excess of carbonic acid contained in « 44 DISTILLATION OF HYDROCHLORIC ACID. the water; when the gas is expelled during ebullition,the carbonate is precipitated. 68. Test the solution filtered from the carbonate oflime in (66) with chloride of barium, nitrate of silver, lime-ivater, and oxalate of ammonia ; and compare the resultswith those obtained in (63), when the water was ex-amined in its natural state. As most of the lime hasbeen separated as ca
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectchemistry, bookyear18
