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The polarity of water

Chemistry
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How does the polarity of water relate to the intermolecular distance?

Apr 12th, 2015

Polarity of water;

water is a polar substance. Made so by the inter molecular forces (called dipoledipole forces) between' positive and negative charged ends of molecules. water s polar nature is due also to its structure and uneven sharing of electrons. The oxygen atom pulls electrons away from the hydrogen so there is an unequal sharing of elections. think of this as a higher concentration of negative charge around the oxygen atoms. This uneven balance of charge makes the two hydrogen atoms bend away from the oxygen. 

For a substance to be soluble in water it usually must be polar too (remember like dissolves like). However ionic compounds (like NaCl) also dissolve in water  non polar things such as 9CO2) do not dissolve in water. if you've taken organic chemistry note also that anything over about (4 carbons) is relatively insoluble and by about hexane (6 carbons) it is totally insoluble. Note also that molecular branching affects solubility...  

Generally molecules with H, OH, N, S will be polar whereas most things with lots of carbons or diatomic molecules (O2, for example) will be non polar.

Apr 15th, 2015

Distance;

Water is an unusual substance in that its solid form (ice) is less dense than its liquid form (at least at normal temperatures and pressures at the phase transition). This is why ice floats and the phrase tip of the iceberg exists.

The average inter molecular distance is inversely related to the density of a substance. Since the [img src="http://qlx.is.quoracdn.net/main-8645ea3ad35f07aa.png" width="39" height="17" class="math" type="math" title="H_2O" alt="H_2O"> molecules are the same. it follows the the inter-molecular distance in ice is greater than that in water...................


Apr 15th, 2015

Distance;

Water is an unusual substance in that its solid form (ice) is less dense than its liquid form (at least at normal temperatures and pressures at the phase transition). This is why ice floats and the phrase tip of the iceberg exists.

The average inter molecular distance is inversely related to the density of a substance. Since the [img src="http://qlx.is.quoracdn.net/main-8645ea3ad35f07aa.png" width="39" height="17" class="math" type="math" title="H_2O" alt="H_2O"> molecules are the same. it follows the the inter-molecular distance in ice is greater than that in water...................


Apr 15th, 2015

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