little helpon acids (1 Viewer)

[Ragerunner]

acid + base --> salt + water

say u got

NH3 + H2SO4 --> (NH4)2SO4

the numbers are little ones.

how do u get that equation ? the (NH4)2SO4 bit ?

 

[kini mini]

The NH4 ion (ammonium) has 1+ charge, the SO4 ion (sulphate) has 2- charge.

So the ratio is 2:1

 

[wogboy]

All that is happening here is that the sulphuric acid (H2SO4), being an acid, donates two of its (H+) ions, one to each molecule of ammonia (NH3). Therefore ONE molecule of H2SO4 can neutralise TWO molecules of NH3 at once, to form one molecule of
(NH4)2SO4 (ammonium sulphate). You can express this by a balanced chemical equation as follows:

H2SO4 (aq) + 2 NH3 (aq) ==> (NH4)2SO4 (aq)

Another important thing to note about the (NH4)2SO4 (ammonium sulphate) formed by the neutralisation reaction, depsite being a salt, it is slightly acidic (not neutral). The reason for this is that it was formed by a strong acid (H2SO4) reacting with a weak base (NH3), and so you can think of it being as the acid dominating the base, making the product slightly acidic.

 

[Ragerunner]

thanks for that info

I was mainly confused when it says

Acid + Base ==> Salt + Water

But i couldn't figure out where the water is

Also is H2SO4 giving 2 H+ ions because it is diprotic ?

 

[McLake]

Originally posted by Ragerunner
Also is H2SO4 giving 2 H+ ions because it is diprotic ?

Yes.

 

[abdooooo!!!]

Originally posted by Ragerunner
Acid + Base ==> Salt + Water

But i couldn't figure out where the water is

ammonia + acid ==> ammonium salt
acid + base ==> salt + water; this is used to describe neutralisation reactions because most them form water but ammonia is a special case.