chemistry

posted by .

Too make a 4% solution of paraformaldehyde from a 20 % solution.

C1V1=C2V2
(20)(10ml)= (4)(x)
x= 50ml

so I would need to add 45ml of PBS and 4ml of the paraformaldhyde.

Is that right.

  • chemistry -

    You have a 20% solution of paraformaldehyde in what solvent?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science

    you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water?
  2. chem

    how much water would you need to add to 20.0 mL of 2.0 M NaCl to make a 0.10 M solution?
  3. chemistry

    how would you make a 4% percent paraformaldehyde solution?
  4. chem please help

    how would you make a 4% percent paraformaldehyde solution?
  5. chem

    how would you make a 4% percent paraformaldehyde solution?
  6. chemistry

    the Ph of a solution of HCl in water is found to be 2.50. what volume of water would you add to 1.00 L of this soltuion to raise the PH to 3.10?
  7. Chemistry

    You have 20mL of a solution of concentration 0.015mg/mL of x in test tube #1. Prepare serial dilutions of your stock solution, and calculated the concentration of x as follows: Add 10mL of distilled water and 10mL of stock solution …
  8. chemistry

    calculate the ph of a solution by addition of 0.1 mL of 0.5m hcl to 50.0 ml pure water. I'm supposed to use c1v1=c2v2... but I did 0.1/50ml=0.002.... 0.002x0.5.. then -log the answer and got 3 for a ph is it right?
  9. Chemistry

    Consider 54.0 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 4.200. What volume of water must be added to make the pH = 5.500?
  10. Chemistry

    Using calculations, determine how you would make a 525 ml pg a 0.50 M solution of Cl- ions using CaCl2. I am unsure how to do this question, I was going to use C1V1=C2V2 but with this I would be missing the first part of the equation. …

More Similar Questions