A chemist attempts to prepare some very pure crystals of borax by dissolving 100g of Na2B4O7 in 200 grams of boiling water. He then cools the solution slowly until some borax crystallizes out. Calculate the grams of borax recovered in the crystals per 100 grams of initial solution (Na2B4Oz plus water), if the residual solution at 55°C after the crystals are removed contains 12.4% NazB4O7.What is the percent yield or percent recovery of Na2B4O7.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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A chemist attempts to prepare some very pure crystals of borax by
dissolving 100g of Na2B4O7 in 200 grams of boiling water. He then cools
the solution slowly until some borax crystallizes out. Calculate the
grams of borax recovered in the crystals per 100 grams of initial
solution (NazB4O7 plus water), if the residual solution at 55°C after the
crystals are removed contains 12.4% NazB4O7.What is the percent yield
or percent recovery of Na2B4O7.
Transcribed Image Text:A chemist attempts to prepare some very pure crystals of borax by dissolving 100g of Na2B4O7 in 200 grams of boiling water. He then cools the solution slowly until some borax crystallizes out. Calculate the grams of borax recovered in the crystals per 100 grams of initial solution (NazB4O7 plus water), if the residual solution at 55°C after the crystals are removed contains 12.4% NazB4O7.What is the percent yield or percent recovery of Na2B4O7.
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