Stephen M.

asked • 03/24/18

Ionic radius of sodium salts

I can't find the ionic radius of sodium sulphate, sodium iodide, sodium bromide and sodium nitrate. A quick google tells me the radius of sodium chloride to be 227ppm. Thanks

Arturo O.

Student,
 
227 ppm is a concentration, not a radius.
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03/24/18

1 Expert Answer

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J.R. S. answered • 03/25/18

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Your question is a little confusing, because when you mention the radius of NaCl to be 227 pm (not ppm as pointed out by Arturo), that is actually the distance between the Na+ and Cl- ions in the NaCl crystal. It isn't really the radius of the salt crystal unit cell.  The actual length of the side of the crystal unit cell would be twice that, or 564 pm.  By the way, pm is picometer.  
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Stephen M.

Thank you for your reply! I apologise for my confusing question, after acquiring further understanding on the topic it is the ionic radii in aqueous solution (water) of the sodium chloride, NaBr, NaNO3, Na2SO4 and NaI is what I need. I have carried out an accelerated migration test on concrete samples. I am drawing up a comparison between the ionic size of the salts and the conductivity of the concrete which represents pore connectivity. So slats with larger ionic radius should have a poorer conductivity.
 
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03/25/18

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