Chemistry

Hello,

I'm having some trouble getting started on this question:
"Calculate the volume and mass required to make 0.1 M solutions of Propionic Acid (1.0 M) and Sodium Propanoate (96.06 g/mol)"

I would normally not have trouble answering this question when either the mass or volume is provided but I do not know how begin answering the question

Any assistance would be greatly appreciated,
Thank you in advance

  1. 👍 0
  2. 👎 0
  3. 👁 368
  1. The way I read the question is that there are two questions; i.e.,
    1. How to prepare 0.1M solution of propionic acid and
    2. How to prepare 0.1M solution of the salt.

    1. Since no volume is given you just assume some volume you want to prepare. 1L is the easiest to assume although that could waste a lot of the compound. So you want 0.1 mols if you prepare 1L.
    How much is 0.1mol? It's molar mass/10. Calculate that mass required. Then look up the density of proponic acid and use mass = volume x density to calculate the volume needed to provide that mass. Add to a volumetric flask, dissolve in a little H2O, make to the mark with DI water, shake thoroughly and stopper.

    2. For sodium propionate, you want 0.1 mol to prepare 1L of the solution. 0.1 mol = mols mass in grams/10. Weigh that amount of the salt, place in a 1 L volumetric flask, dissolve in a little water, make to the mark with DI water, mix thoroughly, stopper.
    I think the secret to answering this question is to decide just how much of each you wish to prepare.

    1. 👍 0
    2. 👎 0
  2. Thank you for your help
    Just to be sure these were the answers I calculated:

    Propionic Acid
    Mass = 0.01g
    Volume = 0.010ml

    Sodium propionate
    Mass = 0.9606g
    Volume = I assume the is the same as the mass (please correct me if im wrong)

    1. 👍 0
    2. 👎 0
  3. I don't buy any of this. The numbers, even if they are right, (and they may be), are not realistic. Who would want to make 0.01 mL of such a solution? That's about two drops. :-)

    1. 👍 0
    2. 👎 0
  4. Yeah it did not seem to make any sense to me either.. I don't know what else I could possibly do in this problem

    1. 👍 0
    2. 👎 0
  5. I told you how to do it. You could try following my instructions. Here is how you do the sodium propionate.
    You want 1 L of 0.1M CH3CH2COONa
    mols needed = M x L = 0.1 M x 1 L = 0.1 mol
    Then mol = grams/molar mass
    0.1 mol = grams/96
    grams = 96 x 0.1 = 9.6 grams.
    Place 9.6 g the substance in a volumetric flask, dissolve in a little water, add DI water to the mark of the flask, mix thoroughly, stopper.

    For the liquid propionic acid, You do the same for mols, then find the grams the same way, then you deviate from the above. Look up the density, calculate mL propionic acid (it's a liquid) from the density and the grams needed, place that many mL of the propionic acid in the volumetric flask and proceed as you did for the solid.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A 25.00mL sample of a household cleaning solution was diluted to 250.0mL in a volumetric flask. A 50.00mL aliquot of this solution required 40.38mL of 0.2506 M HCl to reach a bromocresol green end point. Calculate the

    asked by Ellen on March 28, 2012
  2. Pre Calculus

    Two forces with magnitudes of 150 and 75 pounds act on an object at angles of 30° and 150°, respectively. Find the direction and magnitude of the resultant force. Round to two decimal places in all intermediate steps and in your

    asked by maria on August 18, 2016
  3. Chemisry

    what mass of protons would be required to just neutralize the charge of 1.0g of electrons? how do I answer this? You know the mass of an electron. Calculate how many are in 1 gram. You will need the same number of protons. Knowing

    asked by Chris on February 8, 2007
  4. chemistry

    Calculate the mass of oxygen gas required to occupy a volume of 6 L at a pressure of 20.9 kPa and a temperature of 37◦C.

    asked by sara on April 30, 2015
  5. Chemistry

    the mass of water vapour is given in a volume of air is 0.05g at 20 degree celsius while the mass of water vapour are required to saturate it at the same temperature is 0.15g calculate the relative humidity of the air?

    asked by Sebastian on June 10, 2019
  1. chemistry

    Q1) 5 liters of Butane gas (C4H10) is reacted with plenty of oxygen at 27 oC and 1 atm to produce carbon dioxide and water vapor. Calculate the following: 1- The volume of CO2 produced at 1 atm and 400 oC. 2- The mass of H2O vapor

    asked by David on November 2, 2009
  2. New Light Academy

    A uniform cylindrical pipe has an external diameter of 3.6cm and an internal diameter of 2.8cm. a)Calculate the volume of the material required to construct a metre length of the pipe. b)One cubic metre of material used has a mass

    asked by Kenneth on August 28, 2015
  3. Chem help!!

    A rock salt (NaCl), ice, and water mixutre is used to make homemade ice cream. How many grams of rock salt must be added to lower the freezing point 10.0 degrees C? I have no idea what to do, please help! delta T = Kf*i*m delta T

    asked by Lindsay on May 3, 2007
  4. math- mean value theorem

    Hi I am having some trouble with these few quetions I would appreciate some help so that I can understand them better. 1) What, if anything, does the mean value theorem guarantee for the given function on this interval? a) f(x) =

    asked by manny on September 7, 2007
  5. Chemistry

    I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass

    asked by Melissa on October 23, 2010

You can view more similar questions or ask a new question.