Beautiful Sodium-Chloride crystal

Chemistry Level 1

Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the formula N a C l \ce{NaCl} , representing equal proportions of sodium and chlorine. In chemistry, an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. In case of sodium chloride, the cation is N a X + \ce{Na+} and the anion is C l X − \ce{Cl-} . In solid sodium chloride, how many N a X + \ce{Na+} ions are surrounding one C l X − \ce{Cl-} ion?

4 6 8 10

Lakshan Dumpa by Lakshan Dumpa , 24, India

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1 solution

Given the cubic ionic lattice of NaCl, there are six faces to a cube which would fit around a Cl- ion, resulting in 6 Na+ cations surrounding each Cl-

2 Helpful 0 Interesting 0 Brilliant 0 Confused

you assumed that it is face centered ! ok but every Na atom share with two cubs dos that make it 3 ?

Makh Makh - 7 years, 3 months ago

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Indeed. For C s + Cs^+ and C l − Cl^- their coordination numbers are 8. But for N a + Na^+ and C l − Cl^- , the situation is as described. The picture provided by the question gave an evidence.

Lu Chee Ket - 5 years, 4 months ago

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