Question

In ice crystals, each oxygen atom of water molecule is tetrahedrally surrounded by four other oxygen atoms of different water
molecules. The distance between two oxygen atoms in the ice is​

Answer 1

Answer:

Ice can assume a large number of different crystalline structures, more than any other known material. At ordinary pressures the stable phase of ice is called ice I, and the various high-pressure phases of ice number up to ice XIV so far. (Ice IX received some degree of notoriety from Kurt Vonnegut's novel Cat's Cradle.)

There are two closely related variants of ice I: hexagonal ice Ih, which has hexagonal symmetry, and cubic ice Ic, which has a crystal structure similar to diamond. Ice Ih is the normal form of ice; ice Ic is formed by depositing vapor at very low temperatures (below 140°K). Amorphous ice can be made by depositing water vapor onto a substrate at still lower temperatures.iceIhx.gif (3796 bytes)

Each oxygen atom inside the ice Ih lattice is surrounded by four other oxygen atoms in a tetrahedral arrangement. The distance between oxygens is approximately 2.75 Angstroms. The hydrogen atoms in ice are arranged following the Bernal-Fowler rules: 1) two protons are close (about 0.98A) to each oxygen atom, much like in a free water molecule; 2) each H20 molecule is oriented so that the two protons point toward two adjacent oxygen atoms; 3) there is only one proton between two adjacent oxygen atoms; 4) under ordinary conditions any of the large number of possible configurations is equally probable

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