Textbook Question 9C.1

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Anne Kim 3F
Posts: 34
Joined: Fri Sep 28, 2018 12:25 am

Textbook Question 9C.1

Postby Anne Kim 3F » Tue Dec 04, 2018 6:37 pm

a) says [Fe(CN)6]^4-

however the answer is tetracholoroferrate (II)

why is iron called ferrate and why is the charge (II) and not (IV)

Lauren Ho 2E
Posts: 70
Joined: Tue Oct 09, 2018 12:16 am

Re: Textbook Question 9C.1

Postby Lauren Ho 2E » Tue Dec 04, 2018 7:21 pm

Anne Kim 3F wrote:a) says [Fe(CN)6]^4-

however the answer is tetracholoroferrate (II)

why is iron called ferrate and why is the charge (II) and not (IV)


Each CN contributes to a -1 charge, meaning (CN)6 has a total charge of -6.

If [Fe(CN)6]^4- has a net charge of -4 and (CN)6 contributes to -6 of that charge, Fe must have a charge that, when added to -6, leads to -4. Therefore, it has a charge of +2.

Anne Kim 3F
Posts: 34
Joined: Fri Sep 28, 2018 12:25 am

Re: Textbook Question 9C.1

Postby Anne Kim 3F » Tue Dec 04, 2018 7:35 pm

laurenho-4c wrote:
Anne Kim 3F wrote:a) says [Fe(CN)6]^4-

however the answer is tetracholoroferrate (II)

why is iron called ferrate and why is the charge (II) and not (IV)


Each CN contributes to a -1 charge, meaning (CN)6 has a total charge of -6.

If [Fe(CN)6]^4- has a net charge of -4 and (CN)6 contributes to -6 of that charge, Fe must have a charge that, when added to -6, leads to -4. Therefore, it has a charge of +2.



Got it! Thanks!


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