Chemical News and Journal of Industrial Science, Tomy 101-102Chemical news office., 1910 |
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Strona 2
... ACID EARTHS . * By LUDWIG WEISS and MAX LANDECKER . I. THE number of exhaustive researches on niobium and tantalum ... sulphuric acid present . It is known that it is a peculiarity of niobic acid if it is precipitated with sulphuric acid ...
... ACID EARTHS . * By LUDWIG WEISS and MAX LANDECKER . I. THE number of exhaustive researches on niobium and tantalum ... sulphuric acid present . It is known that it is a peculiarity of niobic acid if it is precipitated with sulphuric acid ...
Strona 3
... sulphuric acid cannot be effected even when the ignition process is repeated . Moreover , as we have found , niobic acid can never be completely precipitated by boiling with sulphuric acid , and it is almost impossible to filter it ...
... sulphuric acid cannot be effected even when the ignition process is repeated . Moreover , as we have found , niobic acid can never be completely precipitated by boiling with sulphuric acid , and it is almost impossible to filter it ...
Strona 4
... acid is evaporated , when it is sufficiently concentrated , beautiful very silky- looking asbestos - like threads ... sulphuric acid , and hydrogen peroxide is added when the production of a red or yellow coloration shows the presence of ...
... acid is evaporated , when it is sufficiently concentrated , beautiful very silky- looking asbestos - like threads ... sulphuric acid , and hydrogen peroxide is added when the production of a red or yellow coloration shows the presence of ...
Strona 5
... acid earths have been fused with potassium sulphate and the melt extracted with water , the solution is boiled with ... sulphuric acid solution ; hydro - 03 chloric acid has the disadvantage of evolving chlorine with hydrogen peroxide ...
... acid earths have been fused with potassium sulphate and the melt extracted with water , the solution is boiled with ... sulphuric acid solution ; hydro - 03 chloric acid has the disadvantage of evolving chlorine with hydrogen peroxide ...
Strona 7
... sulphuric acid , after which each is titrated with standard permanganate . A second method is that A. N. Finn ( Journ . Am . Chem . Soc . , Oct. , 1906 ) . The ore is dissolved in dilute sulphuric acid ( 15 ) , evaporated to fumes ...
... sulphuric acid , after which each is titrated with standard permanganate . A second method is that A. N. Finn ( Journ . Am . Chem . Soc . , Oct. , 1906 ) . The ore is dissolved in dilute sulphuric acid ( 15 ) , evaporated to fumes ...
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