part a was marked incorrect, i dont know what i did wrong. please outline explan
ID: 572865 • Letter: P
Question
part a was marked incorrect, i dont know what i did wrong. please outline explanation strp by step.
4. A student purified a 500-mg sample of phthalic acid by recrystallization from water. The published solubility of phthalic acid in 100 mL of water is 0.54 g at 14 C and 18lg at 99 C ng water the student could use to dissolve 500 mg of phthalic acid? 50 -18x 3b 10 -126 8 Dissolution of phthalic acid in boiling water produced a dark-colored solution. The student allowed the solution to cool, added several spatulas full of activated carbon, and heated the mixture to boiling. After gravity filtration, the clear and colorless solution was allowed to cool to room temperature. Crystals formed, and the student isolated 380 mg of phthalic acid (b) Calculate the percent recovery of phthalic acid in this experiment. yecover 50 mass of oude compond Ca)Explanation / Answer
Solution-
From the question we have
Given:
the published solubilities of phthalic aicd are
0.54g/100mL at 14C
18g / 100mL at 99C
a) when water is at 99C the solubility of the acid is more
therefore
smallest volume of boiling water = 500mg / (18g/100mL)
= 0.5g / (18g /100mL)
= 2.78mL
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