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are the carbonates that dissolve in water classed as alkalies?

Are the carbonates that dissolve in water classed as alkalies? Do all alkalies have to release OH- ions?
(edited 10 years ago)
Reply 1
Original post by celina10
Are the carbonates that dissolve in water classed as alkalies? Do all alkalies have to release OH- ions?


Do you mean hydroxides?? If so then yeah
As far as I remember a lot of carbonates insoluble

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(edited 10 years ago)
Original post by bad8oy
Do you mean hydroxides?? If so then yeah



No I mean carbonates.

Original post by bad8oy

As far as I remember a lot of carbonates insoluble



But would the ones that are soluble be classed as alkalies, as alkalies are soluble bases.
Reply 3
Original post by celina10
anyone?


I imagine so, yes.
Original post by celina10
anyone?


When carbonates dissolve in water they form hydroxides, so yes they'd be described as alkali :smile:

CaCO3 + H20 ----> Ca(OH)2 + CO2 iirc
Original post by bananarama2
I imagine so, yes.



Original post by Rump Steak
When carbonates dissolve in water they form hydroxides, so yes they'd be described as alkali :smile:

CaCO3 + H20 ----> Ca(OH)2 + CO2 iirc


Do all alkalies dissociate to form OH- ions?
Reply 6
Original post by celina10
Do all alkalies dissociate to form OH- ions?


Yeah


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Original post by celina10
Do all alkalies dissociate to form OH- ions?


Most.
Correct way to think of it is "all species which dissociate to form OH- ions are alkali"
But not all alkalis dissociate to form OH- ions if that makes sense.
(e.g. NH3 is alkali, but doesn't form OH- ions)
What the poster above said...

An alkali is a proton acceptor, they can accept hydrogen ions from acids, they do not necessarily release OH- ions

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