Sapling Week 9 Q2

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Marisa Gaitan 2D
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Sapling Week 9 Q2

Postby Marisa Gaitan 2D » Wed Dec 02, 2020 11:19 am

In the second part of the question, it asks for the oxidation state of the central atom in [AgCl2]-. How would you calculate this? I'm kind of rusty on my high school chem and would really appreciate it if someone could explain their thought process. Thanks!

Janelle Gokim 3B
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Re: Sapling Week 9 Q2

Postby Janelle Gokim 3B » Wed Dec 02, 2020 11:23 am

We know the overall charge of the coordination compound is negative 1 to start off. When we look within he brackets, we see two Cl, and looking at its location on the periodic table, in Group 7, we know that Cl will have a -1 charge because it only needs one more electron to have an octet. Therefore, with the 2 Cls, we have a negative 2 charge. Going back to the entire compound having a negative 1 charge, in order to make that true, the central atom, or Ag in this case, must be +1, because the -2 from the Cls and the +1 from Ag will yield the overall charge of -1. Hope that makes sense!

Juwon Lim 2A
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Re: Sapling Week 9 Q2

Postby Juwon Lim 2A » Wed Dec 02, 2020 12:50 pm

The overall charge of the compound is -1. Cl each have a charge of -1, and since there are two, this would bring the charge of the compound to -2. Therefore, to reach the overall charge of -1, Ag must have a charge of +1, so an oxidations state of 1+

Ven Chavez 2K
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Re: Sapling Week 9 Q2

Postby Ven Chavez 2K » Wed Dec 02, 2020 2:03 pm

To find the oxidation number, its based on the charges of the atoms. For this question, the total charge is -1. There are two chlorides which have -1 charge each meaning they provide a -2 charge. In order for the total charge to be -1, Ag would have to be +1 so that -2 +1 = -1.

Ven Chavez 2K
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Joined: Mon Feb 24, 2020 12:16 am

Re: Sapling Week 9 Q2

Postby Ven Chavez 2K » Wed Dec 02, 2020 2:03 pm

To find the oxidation number, its based on the charges of the atoms. For this question, the total charge is -1. There are two chlorides which have -1 charge each meaning they provide a -2 charge. In order for the total charge to be -1, Ag would have to be +1 so that -2 +1 = -1.

Sabrina Galvan 3J
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Re: Sapling Week 9 Q2

Postby Sabrina Galvan 3J » Wed Dec 02, 2020 2:45 pm

Ag can take on the oxidation states of +1, +2. & +3 because it is a transition metal. Therefore to determines its oxidation state within this question lies on the overall charge of the molecule, which is -1. Cl has an oxidation state of -1, and because there are two Cl, it contributes to a total charge of -2. Going back to the molecules overall charge being -1, Ag has to take on oxidation state of +1.
unknown Ag oxidation + 2(Cl oxidation) = -1
unknown Ag oxidation + 2(-1) = -1
unknown Ag oxidation + -2 = -1
unknown Ag oxidation = +1


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