Focus 9C.3

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Angela Patel 2J
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Focus 9C.3

Postby Angela Patel 2J » Mon Nov 25, 2019 3:36 pm

In part a), how do we know that there are three potassium atoms?

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Re: Focus 9C.3

Postby Chem_Mod » Mon Nov 25, 2019 3:37 pm

Please post the entire question so that it is easier for us to give you an answer.

Kevin Antony 2B
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Re: Focus 9C.3

Postby Kevin Antony 2B » Mon Nov 25, 2019 3:39 pm

The Roman Numeral (III) tells us that.

Jordan Young 2J
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Re: Focus 9C.3

Postby Jordan Young 2J » Mon Nov 25, 2019 3:41 pm

The Roman Numeral (III) is for the chromate. There are 3 K so that the charge is neutral. The 6 CN have a total of a 6- charge, the Cr has a 3+ charge, and since each K has a 1- charge, there are 3 of them to make the coordination compound neutral.

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Re: Focus 9C.3

Postby Chantel_2I » Mon Nov 25, 2019 8:54 pm

The total charge of the whole anion is -3, so the charge of the cation must be +3 in order to neutralize the compound. Since the charge of potassium is +1, there must be three of them to reach a +3 charge.

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