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14 November, 09:52

The O'Keefe's have 75 gallons of cucumbers for pickling. The 1.5 M KOH solution costs $3.50 per liter, 9 M H2SO4 solution costs $8 per liter, and ethanol costs $20 per liter. A 50 g jar of alum from the grocery store costs $5.79. Do you think it's worth the time and trouble for Richard and Diane to make their own alum from discarded aluminum cans? Explain your answer showing all calculations.

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  1. 14 November, 10:49
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    Start from the chemical equations of the procedure to make alum

    2Al + 2KOH + 6H2O - - - > 2KAl (OH) 4 + 3H2

    KAl (OH) 4 + 2H2SO4 + 8H2O - - - > KAl (SO4) 2.12H2O We we are done in performing all the calculation, I think that their time and trouble is worth to make the alum because for every 75 gallons of pickles, they save $14.00.
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