Question

a solution was made by mixing sodium chloride () and water (). given that the mole fraction of water is 0.980 in the solution obtained from 64.9 g , calculate the mass of sodium chloride used.

Answer 1

The mass of sodium chloride used was 1.17 grams.

The mole fraction can be calculated by way of dividing the number of moles of 1 factor of an answer via the full variety of moles of all the additives of an answer. it is mentioned that the sum of the mole fraction of all the components inside the solution has to be the same as one.

mass  of NaCl given =  64.9 g

mole  = mass/molar mass

          = 64.9 / 58.5

          = 1.109

a mole fraction of water =  0.980

mole fraction of NaCl = 1 - 0.980

                                   = 0.02

1 mole of NaCl =  58.5

mass of NaCl  = 58.5 × 0.02

                       = 1.17 gram

Mole Fraction describes the range of molecules contained within one aspect divided through the whole range of molecules in a given combination. it's miles quite beneficial whilst two reactive-natured components are mixed collectively.

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