Home
Class 12
CHEMISTRY
Radii of K^(+)andO^(2-) ions are 1.51Å a...

Radii of `K^(+)andO^(2-)` ions are 1.51Å and 1..62Å, respectively. Predict the structure of `K_(2)O`.

Text Solution

Verified by Experts

`(r_(K^(+)))/(r_(O^(2-)))=1.51/1.62=0.93`. As this value of radius ratio lies in the range `0.732-1.00`, one can expect `K^(+)` ion should occupy cubic holes formed by packing of oxide ions. However in reality `K_(2)O` is found to have an anti fluorite structure. In `K_(2)O" "O^(2-)` ions form ccp aray and `K^(+)` ions occupying all the octahedral holes in the array.
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    CHHAYA PUBLICATION|Exercise WARM UP EXERCISE|70 Videos

  • SOLID STATE

    CHHAYA PUBLICATION|Exercise VERY SHORT ANSWER TYPE|60 Videos

  • PREVIOUS YEARS QUESTION PAPER 2019

    CHHAYA PUBLICATION|Exercise WBCHSE 2019 PART-B|19 Videos

  • SOME p-BLOCK ELEMENTS

    CHHAYA PUBLICATION|Exercise PRACTIVE SET 11|15 Videos

Similar Questions

Explore conceptually related problems

The crystal structure of Zinc blende (ZnS) consists of cubic close-packed (ccp) array of S^(2-) ions. If the radii of Zn^(2+)andS^(2-) ions are 0.74 and 1.84Å respectively, then which type of voids (tetrahedral or octahedral) formed in ccp array of S^(2-) ions are occupied by Zn^(2+) ions? What fraction of total number of this void remains unoccupied?

The two ions A^(+)andB^(-) have radii 102 and 200 pm respectively. Predict the coordination number of A^(+) and crystal structure of compound AB.

In O_(2) and H_(2)O_(2) , the O-O bond lengths are 1.21 Å and 1.48Å respectively. In ozone, the average O-O bond length is-

The critical temperature of NH_(3),CO_(2) and O_(2) gases are 405.6K, 304.1 K and 154.2 K, respectively. If the gases are cooled from 500 K to their respective critical temperature, then which gas will be liquefied first?

In O_(2) and H_(2)O_(2) , the O-O bond lengths are 1.21 and 1.48Å respectively. In ozone, the average O-O bond length is

The equilibrium constant K_(p1) and k_(p2) for the reactions xhArr2y and zhArrp+q respectively are in the ratio of 1 : 9 . If the degree of dissociation of X and z be equal then the ratio of total pressure at these equilibrium is-

Ionic radii (Å) of N^(3-),O^(2-) and F^(-) are -

One mole of ice is converted into water at 273K. The entropies of H_2O(s) and H_2O(/) are 38.20 and 60.01 J mol^-1 K^-1 respectively. The enthalpy change for the conversion is .

The equilibrium constant of the following equilibria SO_(2)(g)+(1)/(2)O_(2)(g)hArr SO_(3)(g) 2SO_(3)(g)hArr 2SO_(2)(g)+O_(2)(g) are given by K_(1) and K_(2) respectively. Find the relation between K_(1) and K_(2) .

The rate constant and half-life of a first order reaction at temperature T_(1) " are " k_(1)"min"^(-1) and x_(1) min , respectively and those at temperature T_(2) " are "k_(2) "min"^(-1) and x_(2) min , respectively. If T_(2)gtT_(1) , which is greater , x_(1) " or, " x_(2) ?