NaCl vs. NiCl

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Aria Soeprono 2F
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NaCl vs. NiCl

Postby Aria Soeprono 2F » Mon Nov 26, 2018 3:18 pm

Dr. Lavelle mentioned that salt will completely dissolve so that each ion is surrounded by water molecules, but NiCl won't, and instead will become a coordination compound. Can someone explain why this happens?

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Re: NaCl vs. NiCl

Postby EllerySchlingmann1E » Mon Nov 26, 2018 4:17 pm

For salt, the water completely dissociates the Na and Cl ions because its polarity; the water surrounds all of the separated ions. A similar thing happens with NiCl but here the water actually bonds to the Ni to create a coordinate compound instead of just being electrostatically attracted like with the Na. Hope that helps!

Albert Duong 4C
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Re: NaCl vs. NiCl

Postby Albert Duong 4C » Mon Nov 26, 2018 10:04 pm

To add on, unlike alkali metals like Na, transition metals like Ni are even smaller, highly charged cations and have many empty d-orbitals to accept electrons from groups of ions or molecules that are able to donate an electron pair(aka ligands) to form a coordinate compound.

Tyler Vu 4I
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Re: NaCl vs. NiCl

Postby Tyler Vu 4I » Mon Nov 26, 2018 10:13 pm

Water completely dissociates Na and Cl in salt and surrounds the atoms. The water donates electron pairs to Ni in NiCl and forms coordinate compounds.

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