Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Stearic acid problem

  1. Nov 8, 2006 #1

    I have two questions that I am stuck on involving stearic acid solutions.

    1a) 0.01mL of a solution containing 2 grams per litre of stearic acid in acetone is used. What mass of stearic acid is present in this drop of solution?


    0.01ML solution X (1L/1000mL solution) X 2g stearic acid/1L solution
    = 2 x 10^-5 g

    1b)The density of stearic acid is 0.9408g/mL. What will be the volume of stearic acid left from the drop of solution when all the acetone is evaporated?


    .00002g stearic acid X (1mL/0.9408g stearic acid) X (1L/1000mL)
    = 2 x 10^-8 L

    These are the best solutions I could come up with but I have a feeling both are incorrect. Any help would be appreciated.

    thank you.
  2. jcsd
  3. Nov 8, 2006 #2
    Both look fine.
  4. Nov 10, 2006 #3
    Thank You!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook