Calci carbonat - CALCI CARBONAT Calcii carbonas CaCO3...

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CALCI CARBONAT Calcii carbonas CaCO 3 P.t.l:100,1 Calci carbonat ph i ch a t 98,5 đ n 100,5% CaCO ế 3 , tính theo ch ph m đã làm khô. ế Tính ch t B t m n tr ng, không mùi. Th c t không tan trong n c, ethanol 96% và ether. Tan trong các dung d ch acid loãng kèm ế ướ theo s i b t khí carbon dioxyd. Đ nh tính A. Thêm 5 ml acid acetic loãng (TT) vào 0,1 g ch ph m, ph i có s i b t khí carbon dioxyd. ế Khí thoát ra đ c d n vào ượ dung d ch calci hydroxyd (TT) s xu t hi n k t t a tr ng, t a này ế tan trong dung d ch acid hydrocloric 7 M (TT) quá th a. B. Đ yên dung d ch trên cho đ n khi s i h t b t, thêm 2 - 3 gi t ế ế dung d ch amoni oxalat 4% (TT) , ph i xu t hi n t a tr ng, t a này không tan trong dung d ch acid acetic 6 M (TT) tan trong dung d ch acid hydrocloric loãng (TT) . Ch t không tan trong acid acetic Không đ c quá 0,2%. ượ Hoà tan 5,0 g ch ph m trong 80 ml ế dung d ch
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