Determining charge

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Determining charge

Postby Shanzey » Sun Feb 16, 2020 6:46 pm

How are you able to tell what the charge what of each element is? Do all of the charges cancel each other out to make each side of the reaction neutral?

Mariana Fuentes 1L
Posts: 43
Joined: Wed Nov 15, 2017 3:00 am

Re: Determining charge

Postby Mariana Fuentes 1L » Sun Feb 16, 2020 6:51 pm

I'm having a difficult determining this as well. I'm not sure if there is an easier way to do this, but the way I am finding it takes me a long time and I don't think I am doing it the correct way.

Brittney Hun 2C
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Joined: Wed Sep 11, 2019 12:15 am

Re: Determining charge

Postby Brittney Hun 2C » Sun Feb 16, 2020 7:20 pm

You would use the periodic table patterns and trends. Metals which are on the left of the periodic table will be a positively charged ion depending on the column (column 1 = +1 charge) and will go up to the fourth column. Non-metals, which are on the right of the periodic table, starting the fifth column will be negatively charged depending on the column. (column 5 = -3, column 4 = -2).

Jessica Li 4F
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Joined: Fri Aug 09, 2019 12:16 am

Re: Determining charge

Postby Jessica Li 4F » Sun Feb 16, 2020 8:06 pm

Elements that are not transition-group elements usually have constant charges, especially nonmetals. In those cases, you would just use the charge of the cation or anion. For instance, potassium would be K+ (1+ charge) while chloride would be Cl- and have a -1 charge. To determine the charge of transition group metal ions, calculate the overall charge of the molecule and the charge of the other ions involved and subtract.

Rosa Munoz 2E
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Joined: Wed Sep 18, 2019 12:21 am

Re: Determining charge

Postby Rosa Munoz 2E » Sun Feb 16, 2020 9:13 pm

I am having trouble as well.

Nathan Rothschild_2D
Posts: 131
Joined: Fri Aug 02, 2019 12:15 am

Re: Determining charge

Postby Nathan Rothschild_2D » Sun Feb 16, 2020 9:35 pm

The overall charge of each side should be equal since no electrons are lost or gained in the reaction, just transferred from one molecule to another. I find it best to memorize the common charges for common elements so you know how the charge will change. I do believe for metals there is a correlation for metals in the same group and there charges, just I am unsure what it is at the moment.

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