Giving the formula - Chemistry Watch

Wonyo
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A question came up last year asking to give the formula of Calcium nitrate saying it contains Ca2+ and NO3-

The answer is Ca(NO3)2, but how would you work this out?
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Ryan0887
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(Original post by Wonyo)
A question came up last year asking to give the formula of Calcium nitrate saying it contains Ca2+ and NO3-

The answer is Ca(NO3)2, but how would you work this out?
You need to work out the ion value (+/-) Then ensure that they cancel each other out so the total charge is zero. E.G. Calcium has a charge of 2+ and NO3 has a charge of -1. You would need to of the NO3 -1 to make the total charge equal to zero.
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Wonyo
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(Original post by Ryan0887)
You need to work out the ion value (+/-) Then ensure that they cancel each other out so the total charge is zero. E.G. Calcium has a charge of 2+ and NO3 has a charge of -1. You would need to of the NO3 -1 to make the total charge equal to zero.
oh i get it!! thank you!!
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