Qualitative analysis - Inorganic chem

identification of cations is discussed in this series

[@samwelonkangi8624]

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[@janemaina1138]

Thumbs up 🎉. You have 🪛 it well. God bless you 🙏

[@LinaLoosenge-py2ul]

Great work teacher,, continue with the same spirit sir

[@user-cr1oo2ek1f]

Great analysis

[@VeronicaAwuah-nc2ke]

Excellent job

[@aaronylmwanzyl8459]

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[@alyce9494]

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[@marthawangui2072]

A very nice lesson

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[@Mr.Kunguchemistry]

sure bro

[@prestigemedia5275]

Great one mwalimu.

[@user-hz1qn6cv4z]

Thank you sir talk about the confirmatory tests

[@Mr.Kunguchemistry]

Will do soon

[@PatrickKamau-oi9ct]

Nice 👍

[@robertmuriuki318]

Thanks sire

[@belaachie1244]

When testing for cations do u fucus but on the Na+\Cl-

[@calebmancale384]

Good

[@belaachie1244]

Please sir when you add NaOH or NH3 to a solution what is forming the white ppt?

[@Mr.Kunguchemistry]

Both NaOH or NH3 solutions contain hydroxide ions.The ions react with cations forming insoluble hydroxides(precipitate) .

[@Mr.FabbianMaisiba7]

😮

[@belaachie1244]

And how would u now mk and analysis from that please sir when u add something like NaCl solution are u looking at the cation that is Na+ or the anion Cl-??

[@Mr.Kunguchemistry]

All sodium salts are soluble. Adding NaCl ,you look at Cl-. Can precipitate Pb2+ and Ag+

[@belaachie1244]

@@Mr.Kunguchemistry thanks sir

[@belaachie1244]

@@Mr.Kunguchemistry okk sir that means that the ones that are soluble u don't look at them right?

[@felixmbithi1548]

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[@Mr.Kunguchemistry]

Thanks bwana Mbithi

[@belaachie1244]

And then for anions do u focus on the one carrying the negativity charge or positive charge?

[@Mr.Kunguchemistry]

Anions react with cations. Anions are precipitated by positively charged ions (cations)

[@belaachie1244]

@@Mr.Kunguchemistry while cations are precipitated by negative charge ions?

[@belaachie1244]

Thanks sir

[@Mr.Kunguchemistry]

Correct

[@belaachie1244]

So sir when u add something like Pb nitrate to an unknown solution and a white ppt formed what do u think of?

[@belaachie1244]

Will u think of and anion or cation

[@belaachie1244]

Is it lead or nitrate that is reacting in solution to form the white ppt?

[@Mr.Kunguchemistry]

Nitrates cannot form a pot because all nitrates are soluble. Pb2+ can form a precipitate with Cl-,SO4 2-,CO3 2- & SO4 2-

[@belaachie1244]

@@Mr.Kunguchemistry thanks sir

[@evansnjoroge4401]

in such a case you think about the salts of Pb that are insoluble eg PbX where X is the anion that will make the PbX to be insoluble

[@abdijars0911]

😍😋

[@belaachie1244]

Pls sir are those all the reagents that can be used?

[@belaachie1244]

For the detection of cations?

[@Mr.Kunguchemistry]

These are the most common

[@belaachie1244]

Ok sir what of anions

[@Mr.Kunguchemistry]

There are a few more

[@rabbikriss3709]

Thanks sir