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In an experiment to determine the solubility of solid W in water at 400c, the following results were obtained.

  • Mass of empty evaporating dish = 36.2g
  • Mass of evaporating dish + saturated solution = 52.4g.
  • Mass of evaporating dish + dry solid W = 40.4g
    Use this data to calculate the solubility of W at 400C .

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Mass of saturated solution = 52.4 - 36.2 = 16.2 g 

Mass of solid W = 40.4 – 36.2 = 4.2g

Mass of water = 16.2 – 4.2 = 12g 

Solubility of solid W at 400c = (4.2 x 100)/12 =  35g/100g of water
                                                       

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