Home
Class 11
CHEMISTRY
The well know mineral flourite is chemic...

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)`)

Text Solution

Verified by Experts

The correct Answer is:
(a) 51.8 (b) `11 . 62 xx 10^(23) `
Promotional Banner

Topper's Solved these Questions

  • APPENDIX

    PRADEEP|Exercise 6 WHAT HAPPENS WHEN|1 Videos

  • APPENDIX

    PRADEEP|Exercise 7 WHAT HAPPENS WHEN|1 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    PRADEEP|Exercise Curiosity Questions|2 Videos

Similar Questions

Explore conceptually related problems

Lithium iodide crystal has a face centred cubic unit cell . If the edge length of the unit cell is 550 pm , determine the ionic radius of I^(-) ion

The radius of copper atom is 128 pm. It it crystallises in face centred cubic lattice (fcc), what will be the length the edge of the unit cell ?

The edge length of sodium chloride unit cell is 564 pm. If the size of Cl^- ion is 181 pm. The size of Na^+ ion will be

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

Ammonium chloride crystallizes in a body centred cubic lattice with edge length of unit cell of 390 pm. If the size of chloride ion is 180 pm, the size of ammonium ion would be