Chemical News and Journal of Industrial Science, Tom 34Chemical news office., 1876 |
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Strona 2
... precipitate is at once formed . After cooling , the excess of acid is removed , the residue treated with water , care being taken to avoid rise of temperature ; it is then thrown on a filter and washed with cold water , or , what is ...
... precipitate is at once formed . After cooling , the excess of acid is removed , the residue treated with water , care being taken to avoid rise of temperature ; it is then thrown on a filter and washed with cold water , or , what is ...
Strona 3
... precipitate appears , and the mixture slowly heated to 75 ° , when the formation of gold - like scales commences : this continues for some hours , until nearly all vanadium has separated as meta- vanadic acid , and only a trace is left ...
... precipitate appears , and the mixture slowly heated to 75 ° , when the formation of gold - like scales commences : this continues for some hours , until nearly all vanadium has separated as meta- vanadic acid , and only a trace is left ...
Strona 4
... precipitate ( which consists of copper ortho - vanadate , Cu3Va2O8 , with small excess of vanadic acid ) and heating the deep yel- lowish brown solution , which has a strongly acid reaction to 75 ° . The colour becomes gradually fainter ...
... precipitate ( which consists of copper ortho - vanadate , Cu3Va2O8 , with small excess of vanadic acid ) and heating the deep yel- lowish brown solution , which has a strongly acid reaction to 75 ° . The colour becomes gradually fainter ...
Strona 10
... precipitate , so that it takes a violet - red colour , whilst the liquid turns yellow . The precipitate is too dull to be of any value . If it is washed with water , and treated with 4 per cent of its weight of dilute sulphuric acid ( 1 ...
... precipitate , so that it takes a violet - red colour , whilst the liquid turns yellow . The precipitate is too dull to be of any value . If it is washed with water , and treated with 4 per cent of its weight of dilute sulphuric acid ( 1 ...
Strona 13
... precipitate composed of arsenic with 15 to 4 per cent of tin . He mixes the concentrated acid with a concentrated solution of stannous chloride , filters off the precipitate , and distils , thus obtaining an acid perfectly free from ...
... precipitate composed of arsenic with 15 to 4 per cent of tin . He mixes the concentrated acid with a concentrated solution of stannous chloride , filters off the precipitate , and distils , thus obtaining an acid perfectly free from ...
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