posted by meena

how to prepare 24 μL of 5% H3BO3

  1. DrBob222

    Is that w/w or w/v? I'll assume w/v.
    What sort of equipment is available.
    5% means 5g in 100 mL soln.
    You want 24 uL; therefore,
    5 g x (24E-3/100) = ? g H3BO3 which look like about 1.2 mg H3BO3 and that's easy enough to measure. I don't know how you will measure the 24 uL.

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Weighted Averages

    I am assuming this is a 1,000g mixture. 42% H3BO3 = 420g H3BO3/(420g H3BO3+580g H2O)= 0.42 by mass. 420g H3BO3/(420g H3BO3+580g H2O+Xg H2O)= 0.06 Solve for X Check my thinking. Check my work. There is an alternative approach. You want …
  2. physics

    Identical +7.74 μC charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total potential at the remaining empty corner is 0 V?
  3. Physics

    Calculate the magnitude of the electric field at the center of a square with sides 22.4 cm long if the corners, taken in rotation, have charges of 1.02 μC, 2.04 μC, 3.06 μC, and 4.08 μC (all positive).
  4. Physics please help!!

    A mass M is initially at rest on a horizontal surface, μs=0.30 and μk=0.20 . A horizontal string then pulls M with a tension T. Forces below are magnitudes. Indicate if each statement is correct or incorrect If M does not …
  5. chemistry

    During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl. For lab, it is necessary make the following dilutions (Fill in the blanks): 5μL of Stock Ab + 195μL of buffer …
  6. Chemistry

    H3BO3 -> H+ + H2BO3- Why doesn't H3BO3 break down to something with H3O+ because it is a weak acid?
  7. science

    how to prepare 24 μL of 5% H3BO3
  8. statistics

    Determine the critical region and the critical values used to test the following null hypotheses: a. Ho: μ = 55 (≥), Ha: μ < 55, α = 0.02 b. Ho: μ = −86 (≥), Ha: μ < −86, α …
  9. Physics

    Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.65 μC charge. (Let A = 1.65 μC, B = 6.60 μC, and C …
  10. Chemistry

    25.0 mL of an H3BO3 solution were titrated with 29.15 mL of a 0.205 M LiOH solution to reach the equivalence point. what is the molarity of the H3BO3 solution?

More Similar Questions