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# Formulae of ionic compounds? watch

1. Im kind of stuck here...how do i get the formula??

Can someone tell me the formula of silver(i) nitrate and how they worked it out? thanks
2. Silver Nitrate = Ag(NO3)

Silver (Ag) in this case has a valency of 1+ ....therefore Ag+
whilst the Nitrate ion (NO3) has a valency of 1- ....therefore NO3-

therefore together they form Ag(NO3) brackets aren't really needed!

You should be able to find the formula of ions in your data booklet (if you have one).

Hope this helps
3. (Original post by ScottishShortiex)
Silver Nitrate = Ag(NO3)

Silver (Ag) in this case has a valency of 1+ ....therefore Ag+
whilst the Nitrate ion (NO3) has a valency of 1- ....therefore NO3-

therefore together they form Ag(NO3) brackets aren't really needed!

You should be able to find the formula of ions in your data booklet (if you have one).

Hope this helps
is this right for calcium bromide: CaBr2, because Ca needs to loose 2 electrons right? and Br only needs 1 to make it stable? so 1 calcium and 2 bromines gives each atom a complete energy level? = is this all right?
4. (Original post by ScottishShortiex)
Silver Nitrate = Ag(NO3)

Silver (Ag) in this case has a valency of 1+ ....therefore Ag+
whilst the Nitrate ion (NO3) has a valency of 1- ....therefore NO3-

therefore together they form Ag(NO3) brackets aren't really needed!

You should be able to find the formula of ions in your data booklet (if you have one).

Hope this helps
o nvm
thanks
5. (Original post by Hanz_a93)
is this right for calcium bromide: CaBr2, because Ca needs to loose 2 electrons right? and Br only needs 1 to make it stable? so 1 calcium and 2 bromines gives each atom a complete energy level? = is this all right?
YES! your explanation above is also correct. Remember also, another way to look at it is that you need to get the valency values to cancel out...

i.e. Ca2+ and Br- (so to produce 2-, you will need 2 bromines)

If there is anything else you need/are stuck with, ask any time
6. (Original post by ScottishShortiex)
YES! your explanation above is also correct. Remember also, another way to look at it is that you need to get the valency values to cancel out...

i.e. Ca2+ and Br- (so to produce 2-, you will need 2 bromines)

If there is anything else you need/are stuck with, ask any time
okay thanks alot, ill add ya

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