Home
Class 12
CHEMISTRY
What is the C.N of Ca^(2+) and F^(-) ion...

What is the C.N of `Ca^(2+)` and `F^(-)` ions in `CaF_(2)` crystal lattice ?

A

C.N of `Ca^(2+)=4` and `F^(-)=8`

B

C.N of `Ca^(2+)=6` and `F^(-)=6`

C

C.N of `Ca^(2+)=8` and `F^(-)=8`

D

C.N of `Ca^(2+)=8` and `F^(-)=4`

Text Solution

Verified by Experts

The correct Answer is:
D
Each `Ca^(2+)` ion is surrounded by `8F^(-)` ions and `F^(-)` ion by `4Ca^(2+)` ions. Thus, the C.N. of `Ca^(2+)=8` and of `F^(-)=4` in `CaF_(2)`
Promotional Banner

Similar Questions

Explore conceptually related problems

What is the C.N of Cl^(-) ions in NaCl crystals ?

What are the coordination number (C.N.) of Ca^(2+) and F^(-) ion in calcium fluoride (CaF_(2)) crystal structure?

The Ca^(2+) and F^(-) ions arc located in CaF_(2) crystal respectively at face centred cubic lattice points and in

The Ca^(2+) and F^(-) ions arc located in CaF_(2) crystal respectively at what position ? What is the charge ratio ?

What is the distance between Na^(+) and Cl^(-) ions in NaCl crystal if its density is 2.165g cm^(-3) ? NaCl crystallizes in fcc lattice.

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

Assertion:- Antifluorite structure is 4:8 (cation:anion) type coordination crystal. Reason:- Ratio of no. of cation and anions in CaF_(2) crystal is 1:2

How many Na^(o+) ions sorround each CI^(Θ) ion in NaCI crystal lattice ?

A compound AB_(2) possesses the CaF_(2) type crystal structure. The co-ordination number of A^(2+) and B^(–) ions is the crystal will be: