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When a solution is diluted, the number of moles of the solute decreases, so the molarity decreases??

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    $\begingroup$ moles = molarity X volume $\endgroup$ – MaxW May 5 '19 at 2:31
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    $\begingroup$ Nunber of moles is still the same but the volume of the solution increases $\endgroup$ – Simon-Nail-It May 5 '19 at 2:53
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The number of moles of solute does not decrease on dilution. For example suppose you add 2 moles of NaOH to 100cm3. Now if you dilute this solution to 1000cm3 you are still going to have 2 moles of NaOH. But now the total volume has changed ,hence the concentration also changes.

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