Question

(◍•ᴗ•◍) hey guys can anyone tell me
why is here BaSO4 while valency of barium is 2 and valency of sulphate is also 2
then why is valency not exposed in it and ions are not exchanged

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Answer 1

Answer:

This is because we can also write Ba2(SO4)2

but if we divide then two from both the sides get cancelled which is a rule so it makes it look appropriate and everybody accepts this equation

=} BaSO4

Explanation:

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Answer 2

Explanation:

Here BaSO4 is written because the valency of both Ba and SO4 is 2.

And we have to simply the valency if it can be hence 2 and 2 cancel each other.

It does not indicate that exchange of ions is not there, without it new compound cannot be formed.

Hope you understood !