Question

calculate the weight of sodium hydroxide required to prepare 0.5 molar solution into litre volumetric flask



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Answer 1

Explanation:

2 L volumetric flask means a 2L solution of NaOH. Total moles of NaOH formula units in this solution is 2 litres×0.5 moles per litre=1 mole of NaOH.So 1 mole of solid NaOH is required to prepare the solution.Which equals to 1mole× 40 gram / mole NaOH=40 gram NaOH. Molar mass of NaOH is 40 gram/mole.