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which contains more molecules of a 1 L solution of 0.5M solution of NaF or 0.5...

which contains more molecules of a 1 L solution of 0.5M solution of NaF or 0.5 M of H3PO4

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Answer #1

No. of moles = Molarity * volume in litres
   for both of them its equal

but when in solution they both will dissociate

NaF(aq) = Na+(aq) + F-(aq) being a strong electrolyte it will dissociate completly and form 2 times moles of NaF ions in solution as its Ksp(solubility product) is very high

although it has 3 H+ and on PO4- to be produced from a single molecule of H3PO4 but Ksp of H3PO4 is quite low as can be seen from figure below and hence it won't dissociate much and forming limited ions in solution
  NaF contains more ions in solution than H3PO4

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