This topic contains a solution. Click here to go to the answer

Author Question: The experimental procedure in a chemical journal describes the exothermic reaction of 10.0 g of ... (Read 34 times)

ap345

  • Hero Member
  • *****
  • Posts: 537

The experimental procedure in a chemical journal describes the exothermic reaction of 10.0 g
  of compound A in 25 mL of solvent with 75 mL of solution B in a 250-mL Erlenmeyer flask.
  (a) What size flask would you choose for the reaction of 500 mg of compound A? Explain.
  (b) What size flask would you choose for the reaction of 15.0 g of A? Explain.



Question 2

When HCl is emitted from a reaction mixture, why do we not simply bubble the effluent gas
  through a solution of NaOH to trap it?




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

essyface1

  • Sr. Member
  • ****
  • Posts: 347
Answer to Question 1

(a) With a 0.5 g reaction, the reactions isze is (0.5/10) or 0.05 times the original. Therefore, you
will need a total of 5 mL of solvent. Use a flask that is at 2X the size of the volume of sol
vent, or a 10 mL Erlenmeyer flask.
(b) The size of the reaction is 1.5X the original. Therefore, 150 mL of solvent will be needed.
This volumne can still be accommodated in the 250 mL Erlenmeyer flask.



Answer to Question 2

The dissolving HCl creates a vacuum in the gas effluent tube that will suck the sodium
hydroxide solution back into the reaction vessel.





ap345

  • Member
  • Posts: 537
Reply 2 on: Aug 23, 2018
YES! Correct, THANKS for helping me on my review


dantucker

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

For a complete list of videos, visit our video library