Test 3 6b

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CaminaB_1D
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Joined: Fri Sep 28, 2018 12:16 am

Test 3 6b

Postby CaminaB_1D » Sat Dec 08, 2018 11:59 pm

what was the answer to this 6b on test 3?

Order these cations from least to most polarizing power: Li+,Ca2+,Cs+,Ba2+

and can you explain why?

Sara Lakamsani 4D
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Test 3 6b

Postby Sara Lakamsani 4D » Sun Dec 09, 2018 12:41 am

Polarizing power has to do with the strength of the nuclear charge. Smaller atoms have higher polarizing power because there is less shielding of the positive charge. With that information, we know that Li+ has a higher polarizing power than Ca2+ which has a higher polarizing power than Cs+ and Ba2+. The Cs+ and Ba2+ ions have similar atomic radii, but the Ba2+ has a greater positive charge so it has more polarizing power

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: Test 3 6b

Postby Alana Sur 3B » Sun Dec 09, 2018 12:41 am

Cations that are small and highly charged have a high polarizing power. So as you go down a group, polarizing power decreases. The order was Cs < Ba < Ca < Li


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