00:01
Okay, so let me write the formula we have given x3, po4, all twice.
00:12
This is po3 actually, okay? x3, po3 fold twice.
00:19
Now, consider the symbols we have given.
00:24
We have x and we have this po3, okay? so this po3 has valency minus 3 actually, okay, minus 3.
00:40
And this x has valency plus 2.
00:43
This is because when we write the chemical formula, the valencies get exchanged.
00:47
Okay? so we can predict that the po3, that is called phosphite actually.
00:55
So that has valency minus 3 and x has valency plus 2...