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How can I identify ions in solutions?

Answer 1

Well, you would have to perform chemical tests to be sure.

Some common ions, such as halide ions, copper ions, zinc ions, and ammonium ions can be easily tested.

Halide ions will react with silver nitrate #(AgNO_3)# to give coloured precipitates of silver halides. For example, chloride ions will react with #AgNO_3# to give out silver chloride #(AgCl)#, which is an insoluble white precipitate.

Copper ions are usually in their #+2# state, and are blue in coloured solutions. To test for them, simply add some sodium hydroxide and a blue precipitate of copper(II) hydroxide #(Cu(OH)_2)#will form.

Of course, there are many other tests, and these are the basic ones.

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Answer 2

Wyatt Adkins

You can identify ions in solutions through various techniques including precipitation reactions, acid-base reactions, and complexation reactions. Analytical methods such as ion chromatography, atomic absorption spectroscopy, and flame tests are also commonly used. Additionally, techniques like mass spectrometry and nuclear magnetic resonance spectroscopy can be employed for more precise identification.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.