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Yield Calculation Examples:

A student added 10.00 grams of a mixed yellow and white solid into 100.0ml of water at room temperature. The water and solid are stirred for 10.0 minutes. The mixture of solid and liquid is then poured through a filter. Yellow solid is collected in the filter. The total mass of the yellow solid is 3.71 grams. Evaporating the filtered liquid yields a white solid. The white solid has a mass of 5.12 grams. Using the starting amount of solid, calculate the percent yield of…

  1. Yellow solid
  2. White solid
  3. Total solid recovered

Percent Yield (%Y) = (final amount of interest/starting amount) *100
So… if

FA – Final amount and
SA – starting amount

Y% = (FA / SA)*100

  1. Yellow amount = 3.71. Starting solid was = 10.00 grams
    %Y = (3.71/10.00)*100 = 37.1%
  2. White amount = 5.12. Starting solid was = 10.00 grams
    %Y = (5.12/10.00)*100 = 51.2%
  3. Total solid = white + yellow = 3.71 + 5.12 = 8.83 grams.
    Starting solid was = 10.00 grams
      %Y = (8.83/10.00)*100 = 88.3%.

    Note this condition: It is possible not to end up with 100% of the material. Some may have been lost during transfers from glassware or lost on the filter paper.