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Question:

If aluminium chloride is white precipitate?? does that mean aluminium sulphate ,aluminium nitrate is white?

also? then calcium chloride is white colour? does that mean calcium sulphate and calcium nitrate is white in color too? and what did u get when sodium hydroxide plus aluminium sulphate? when other metal hydroxides plus aluminium sulphate or aluminium chloride or aluminium nitrate?? is it white precipitate?

Answer:

Colour Of Aluminium Sulphate
aluminium chloride is white aluminium sulphate is white aluminium nitrate is white they are all white because neither the aluminum, or the negative ion have color... and neither do their combination have color, (some aluminum compounds have color, not these). some aluminum materials made with a different negative ion do have color. --------------- calcium chloride is white calcium sulphate is white calcium nitrate is white again , not because of calcium, but because neither calcium or the neg ion have color, neither do the combinations, some calcium materials made with a different negative ion do have color. ------------------ when small amounts of metal hydroxides are added to aluminium sulphate or aluminium chloride or aluminium nitrate ....they will produce a ppt of aluminum hydroxide, which sometimes it is so transparent that it is invisible in the water, however it is usually cloudy enough to look white. if a person continues to add hydroxide the ppt will react to form a soluble -1 ion of [Al(OH)4] , and so your ppt dissolves

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