Question

(b) how does the concentration of hydrogen ions h 3o changes when the solution of an acid is diluted with water?

Answer 1

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The concentration of hydronium ions decreases when an acid is diluted because on adding water the H+ ions of the acid and hydroxyl ions of water react to form water molecules and the concentration of hydronium ions decreases.

H+ + H2O →H3O+

H+ + OH- →H2O