What is a dipole (chemistry)?

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Hi I really don’t understand this part. It isn’t in my Grade 9 syllabus but alot of points in my notes touch on dipole in atoms. Can someone explain it to me using analogies or just simple words?

For example, heres an extract from my notes:

1. Most ionic compounds are soluble due to favourable ion-dipole interactions
1. water separates positive ions from negative ions, causing them to dissolve

In: Chemistry

3 Answers

Anonymous 0 Comments

Water molecules are polar because of their physical shape. The two hydrogen atoms and single oxygen form a V shape, as they share elections. The hydrogen atoms are ‘lending’ their elections to the oxygen. The result is that the water molecule at the ‘top’ of the V is more positively charged than the bottom, creating a dipole.

Compare this with a non-polar methane molecule, CH4. Here the hydrogen atoms are evenly distributed around the carbon atom, so there is no charge difference.

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