chem

posted by .

The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 106 (one million) parts of solution.
Mathematically by mass: ppm = µg solute / g solution = mg solute / kg solution

In the case of very dilute aqueous solutions, a concentration of 1.0 ppm is equal to 1.0 µg of solute per 1.0 mL, which equals 1.0 g solution. Parts per billion is defined in a similar fashion. Calculate the molarity (M) of each of the following aqueous solutions.

6.7 ppb Hg in H2O

  • chem -

    1.0 ppb = 1.0 micrograms/L
    6.7 ppb = 6.7 micrograms/L
    6.7 micrograms Hg/atomic mass Hg = mols Hg and mols Hg/L = Molarity.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Complete the following table for aqueous solutions of caffeine, C8H10O2N4. a) molality b) mass percent solvent c) Ppm solute All we're given is Mole fraction solvent= .900. How do I solve for the other parts with only this?
  2. hypothesis testing by mean levels

    hi everyone... i have this homework.. i tried to solve it... can anyone check if it's right or not, please?
  3. Chemistry

    Carbon dioxide gas has a solubility of 0.0972 g/100 g H2O at 40 degrees celsius. Expressed in parts per million, this concentration is closest to... (1)0.972 ppm (2)9.72 ppm (3)97.2 ppm (4)972 ppm
  4. Chemistry

    A 200. gram sample of a salt solution contains 0.050 grams of NaCl. What is he concentration of the solution in parts per million?
  5. chemistry

    If 19.7 g of CaCl2 are present in 200 mL of aqueous solution, what is the concentration in terms of the following?
  6. chemistry

    Calculate the concentration in parts per million (ppm) of the solute in each of the following aqueous solutions (a) 0.00500 g of sodium chloride in 850 mL of solution
  7. chemistry

    (ppm and ppb are sooo not easy for me to get)c A saturated solution of PbCO3 contains 0.00011 g PbCO3 in 100. g of water. What is this concentration in parts per million?
  8. Stat Help

    The Momoland Springs Company claims that there are at most 1 ppm (parts per million) of benzene in their water. Test at a=.10 n=25 = 1.10 ppm s = .20 ppm
  9. chemistry

    A solution is made by dissolving 811.0 cg of barium hydroxide, Ba(OH)2, in 0.1137 kg of water. What is the concentration in parts per million?
  10. Chemistry -Dr.Bob

    Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. What is the molar concentration of arsenic in a water sample that has 1ppm arsenic (As)?

More Similar Questions