How to tell apart aluminium sulphate, ammonium sulfate and magnesium sulfate?

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Kyouya3S
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We are given silver nitrate solution, sulphuric acid and ammonium hydroxide.
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÷by0
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First gives a precipitate when a halide ions are added, eg. HCl. Second two can be determined using universal indicator.
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tuxedo-
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I believe magnesium hydroxide is quite insoluble in water, while the other hydroxides are soluble. So adding ammonium hydroxide to them possible will let you find which is the magnesium sulfate as that one should form a precipitate but the others won't?

Do you have any other equipment you can use?
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tuxedo-
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(Original post by ÷by0)
First gives a precipitate when a halide ions are added, eg. HCl. Second two can be determined using universal indicator.
How to tell apart aluminium sulphate, ammonium sulfate and magnesium sulfate?
We are given silver nitrate solution, sulphuric acid and ammonium hydroxide.
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