If all molecules are exactly the same than why only some of the ions gets dissociation in some weak acids and bases

Question

If all molecules are exactly the same than why only some of the ions gets dissociation in some weak acids and bases

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Answer 1

The bouncing around of molecules in solution causes some to break apart by random chance, and others to come back together. The result is a balance of broken and not-broken ones, which shifts more toward the broken side as the molecule becomes less stable.

Individual molecules are constantly splitting and reforming.