Chemistry

posted by .

You isolate an acidic compound in an experiment by first separating it from the organic layer. Then you have a solution containing a salt of an acid. You acidify it using concentrated HCl. A precipitation begins to form while the solution is still basic.. why? You continue the precipitation by submerging the solution in an ice bath. The precipitated acid is then rinsed with deionized water, and dried using suction filtration. What could be done to this method to improve the yield?

  • Chemistry -

    If I understand what you've done, couldn't you continue adding HCl to convert more of the salt to the acid BEFORE submerging in an ice bath?

  • Chemistry -

    Sorry, I need to clarify.
    My question is why does a precipitate begin to form even though the solution is still basic (before enough HCl is added to make it acidic).
    Enough HCl is added to make the solution acidic, then it is submerged in an ice bath where the precipitate continues to form. The acid is then rinsed and dried as described above.
    My second question is what could you do to this technique to improve the yield of the acidic compound?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. organic chemistry

    1)Why benzoic acid is soluble in NaOH? 2)Why HCl is insoluble in titration of benzoic acid and NaOH?
  2. chemistry

    1)when benzoic acid and quinine is dissolved in CH2Cl2 and added 2M NaOH, what is the organic layer and what is the aqueous layer?
  3. chemistry

    Hello! Please correct me if I'm wrong. For the following compound, predict whether the solution is acidic, basic, or neutral and why: NH4Cl. a) acidic, NH4Cl is the salt of a weak base b) neutral because there is no hydrolysis c) acidic, …
  4. Chemistry

    A- a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula …
  5. Chemistry

    A- a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula …
  6. Chemistry

    You can purchase hydrochloric acid in a concentrated form that is 37.0 hcl by mass and has a density of 1.20g/mL. Describe how exactly you would prepare 2.85 L of 0.500 M HCL from the concentrated solution.
  7. Organic Chemistry

    Hi, I did an extraction experiment. I've got my basic layer, and getting my acidic salt in return. To do this, I am instructed to first "add a small amount of NaCl to help with the product precipitation". Then, again I am instructed …
  8. organic chemistry

    0.68g of a solid diprotic acid was dissolved in 30.0mL of a 0.50 NaOH sol'n. the resulting mixture was then back-titrated against 0.20 M HCl; 25mL were required. Calculate the molar mass of the acid. This acid is a solid salt of a …
  9. chemistry

    commercially available concentrated hydrochloric acid is 37.0% w/w HCl. Its density is 1.18 g/mL. Using this information calculate (a) the molarity of concentrated HCl, and (b) the mass and volume (in mL) of solution containing 0.315 …
  10. chemistry

    commercially available concentrated Hydrochloric acid is 37.0% w/w Hcl.its density is 1.18g/ml.using this information calculate (a)the molarity of concentrated Hcl,and (b)the mass and volume (in ml)of solution containing 0.315 mol …

More Similar Questions