14. Solutions

Parts per Million (ppm)

Multiple Choice
What is the concentration of 0.5 g KCl in 3000 g of water in parts per million (ppm)?
Multiple Choice
A sample of seawater has a strontium concentration of 57 ppm. What is the mass of strontium in grams in 1 liter of seawater, assuming the density of seawater is 1.025 g/mL?
Multiple Choice
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
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Multiple Choice
If the concentration of fluoride ions in a nearby river is 14 ppm, how many milligrams of fluoride ions are present in 1 liter of river water?
Multiple Choice
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
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Multiple Choice
In water-treatment and food-safety settings, a chemical sanitizer concentration in dilute aqueous solution is most commonly expressed as which unit?
Multiple Choice
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
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Multiple Choice
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
Multiple Choice
If the pH of rainwater is 5.6, what is the approximate concentration of CO_2 in parts per million (ppm) in the rainwater?
Multiple Choice
A water sample contains 0.005 g of sodium (Na) in 1.0 L of water. What is the concentration of sodium in parts per million (ppm)?
Multiple Choice
Amphetamines in urine can be confirmed by mass spectrometry at a concentration of 500 ng/mL. Assuming a urine density of 1.025 g/mL, what is this concentration in parts per million (ppm)?
Multiple Choice
A water sample contains the pollutant chlorobenzene with a concentration of 16 ppm (by volume). What volume of this water contains 5.01×10² mL of chlorobenzene?
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Multiple Choice
The average human body contains about 5,000 grams of blood. What mass of arsenic is present in the body if the amount in blood is 0.86 ppb?
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Multiple Choice
A 5.12 L sample of solution contains 0.230 g of potassium sulfate, K₂SO₄. Determine the concentration of K₂SO₄ in ppm if the density of the solution is 1.30 g/mL.
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Multiple Choice
A water sample is found to contain the pollutant chlorobenzene with a concentration of 15 ppb (by mass). What volume of this water contains 5.00 × 10² mg of chlorobenzene? (Assume a density of 1.00 g/mL.)