Chemistry

A laboratory technician is required to prepare a quarter normal saline solution (0.22% w/v) from the stock normal saline solution.

1. What is the dilution factor required?

I have 4-fold dilution - is that correct?

2. Ise this dilution factor to calculate the volume of stock needed if one litre of the diluted solution is to be prepared.

I have 0.22 over (divided by) 0.91 = 0.2417582 - is that correct? And how do I then convert it into a fraction in its lowest form?

Thanks.

  1. 0
  2. 2
asked by Korina
  1. I don't know how accurately you want this done but I would think a quarter normal solution would be 0.91/4 = 0.2275 in which case 4-fold dilution is needed.

    2. I don't think it is needed.
    If we use M x mL = M x mL, then
    0.91/100 x mL = 0.2275/100 x 1,000
    mL = 0.2275*1000/0.91 = 250. mL.

    posted by DrBob222
  2. Hi DrBob222,

    Thanks for your help.
    :-)

    posted by Korina

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    A laboratory technician wishes to mix a 70% saline solutio and a 20% solution to prepare 500ml of a 40% solution. What amount of each solution should be used?
  2. chem engineering

    Mass balance on an intravenous injection (IV) bag A nurse sets up an IV drip for a patient consisting of normal saline; assume that this is an aqueous solution containing 150mM salt. The saline drip is supplemented with an
  3. algebra

    Nurse erika needs to prepare 12 liters of a 10% saline solution. The stockroom only has 7 % and 15% saline solutions. How much of each solution should erika mix together to get 12 litres of a 10% saline solution
  4. algebra

    Nurse erika needs to prepare 12 liters of a 10% saline solution. The stockroom only has 7 % and 15% saline solutions. How much of each solution should erika mix together to get 12 litres of a 10% saline solution
  5. ChemII

    A saline solution is 0.9% NaCl. What masses of NaCl and water would be required to prepare 50. L of this saline solution? Assume that the density of water is 1.000g/mL and that the NaCl does not add to the volume of the solution.
  6. Chemistryyy

    a) A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid? b) A
  7. math

    a pharmacist mixed some 10% saline solution with some 15% saline solution to obtain 100ml of a 12%saline solution.How much of 10% saline solution did the pharmist use in the mixture.dO NOT UNDERSTAND TO MUCH INFO.
  8. Chemistry

    1.prepare 2L of 0.150 deci normal aluminum chloride 2.saline solution contains 2grams of its major constituent solute in 1000ml of water.what is it's normality
  9. Science

      17. You need to conduct an experiment in the laboratory. This requires that you prepare 500 ml of  sodium acetate buffer with pH = 4.30. In laboratory you have  solution of CH3COOH (pKa = 4.75), and a stock of CH3COONa.3H2O
  10. Algebra 1 college

    How much of a 12% saline solution should be mixed with a 4% saline solution to obtain 40 milliliters of a 6% saline solution?. Use a system of equations and elimination method to solve. can someone please see if I am on the right

More Similar Questions