Ask Question
24 November, 13:54

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 oc and 18 g at 99 0C. (a) What is the smallest volume of boiling water the student could use to dissolve 500 mg of phthalic acid?

+1
Answers (1)
  1. 24 November, 14:02
    0
    2.77 mL of boiling water is the minimum amount which will dissolve 500 mg of phthalic acid.

    Explanation:

    We know from the problem that 18 g of phthalic acid are dissolved in 100 mL of water at 99 °C.

    Now we devise the following reasoning:

    If 18 g of phthalic acid are dissolved in 100 mL of water at 99 °C

    Then 0.5 g of phthalic acid are dissolved in X mL of water at 99 °C

    X = (0.5 * 100) / 18 = 2.77 mL of water
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “4. A student purified a 500-mg sample of phthalic acid by recrystallization from water. The published solubility of phthalic acid in 100 mL ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers