cooled to 14 C, How many grams of phthalic acid would crystallize out?
2007-01-29 08:27:54 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Approximately 18 g phallic acid dissolves in 100 ml of water at 100 C. So 25 g would need 140 ml H20 at 100C.
.54g phallic acid dissolves at 14C so ppt = 25-0.54 = 24.46g
ref
http://www2.truman.edu/~ramberg/teaching/chem333/crystallization.pdf
2007-01-29 08:48:31 · answer #1 · answered by Dr Dave P 7 · 0⤊ 0⤋
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How many milliliters of boiling water are needed to dissolve 25 grams of phthalic acid ? if the solution were?
cooled to 14 C, How many grams of phthalic acid would crystallize out?
2015-08-13 16:56:35 · answer #2 · answered by Bernette 1 · 0⤊ 0⤋
Missing data -- solubility of phthalic acid in water at different temperatures. You should furnish this or get from physical table of values.
Anyway, for example, say the solubility is 25 g/mL at 100 C, boiling temp
and solubility of 2.5 g/mL. at 14 C
So, one mL of boiling water is needed to dissolve 25 g.
After cooling to 14 C, only 2.5 will still be in solution, thus the amount crystallizing out will be 25 - 2.5 or 22.5 g.
Remember look for the actual value of the solubility.
2007-01-29 08:39:25 · answer #3 · answered by Aldo 5 · 0⤊ 0⤋