Chemistry

posted by .

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.

  • Chemistry -

    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.

  • Chemistry -

    Hi DrBob222,

    Thanks for your help.
    :-)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 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 antibiotic …
  2. Chemistry

    Prepare a 0.0200 mM dye solution at low pH by dilution 0.40 ml of the stock 0.100 mM chemical X into the appropriate volume of 2.5 M HCl. What is the amount of HCL required for dilution, the final concentration of HCl in the solution, …
  3. 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?
  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. 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
  6. Calculating Dilutions

    1. 1 ml serum added to 5 ml saline. 1:2 dilution is made. What is the dilution of serum in tube 6?
  7. dilution please help

    How to use serial dilution to dilute a stock solution at 15000 fold dilution?
  8. Math

    A saline solution is 20% salt. How many gallons of water must be added to dilute the mixture to 8 gals of a 15% saline solution?
  9. CHEMISTRY

    How would you prepare 750 ml of a 10 fold dilution of a 17 M solution of acetic acid?
  10. 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?

More Similar Questions