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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Alok on July 12, 2007, 01:55:50 AM

Title: Why we write (Al2so4)3 not (Al2So4)2 ?
Post by: Alok on July 12, 2007, 01:55:50 AM

Hi All,

I am again asking your favour. As I need to know, why we always write
(Al₂So₄)₃ and not (Al₂So₄)₂ ?

hare krishna
Alok

Title: Re: Why we write (Al2so4)3 not (Al2So4)2 ?
Post by: AWK on July 12, 2007, 02:17:08 AM

We should write
Al₂(SO₄)₃

Title: Re: Why we write (Al2so4)3 not (Al2So4)2 ?
Post by: farrukh_as on July 12, 2007, 07:14:23 AM

yea we dont write (Al2So4)3  we write Al₂(SO₄)₃ because Al (Aluminum) has a charge of 3+ and sulfate ion has a charge of 2- so if we cross multiply the charges it gives u Al₂(SO₄)₃

Al3+

+

SO42-

----> Al2(SO4)3

Title: Re: Why we write (Al2so4)3 not (Al2So4)2 ?
Post by: Alok on July 12, 2007, 08:03:25 AM

Thank you all..

hare krishna
Alok