Understanding PPM in Solutions

This video tutorial explains the concept of parts per million (PPM) as a unit of concentration for solutions with very small amounts of solute. It covers the formula for calculating PPM, which involves dividing the mass of the component by the total mass of the solution and multiplying by 10^6. Two examples are provided: calculating the PPM of selenium in soil and sodium chloride in water. The video concludes with a call to practice more examples to master the concept.

What does PPM stand for in the context of solution concentration?

• Parts Per Mole

• Parts Per Million

• Parts Per Meter

• Parts Per Minute

When is it appropriate to use PPM as a unit of concentration?

• When the solution is diluted

• When the solution is highly concentrated

• When the solute is present in very small amounts

• When the solute is present in large amounts

How is PPM calculated using the mass of a component?

• Volume of component divided by total volume of solution, multiplied by 10^6

• Mass of component divided by total mass of solution, multiplied by 10^6

• Volume of component divided by total mass of solution

• Mass of component divided by total volume of solution

In the first example, what is the mass of selenium in the soil?

• 1.5 grams

• 1.5 micrograms

• 1.5 kilograms

• 1.5 milligrams

What is the total mass of the soil in the first example?

• 3000 grams

• 3000 micrograms

• 3000 kilograms

• 3000 milligrams

What is the PPM concentration of selenium in the soil?

• 0.0005 PPM

• 0.005 PPM

• 0.05 PPM

• 0.5 PPM

In the second example, what is the mass of sodium chloride used?

• 25 grams

• 0.25 grams

• 0.025 grams

• 2.5 grams

What is the total mass of the solution in the second example?

• 100 grams

• 100.025 grams

• 1000.025 grams

• 1000 grams

What is the PPM concentration of sodium chloride in the water?

• 250 PPM

• 2.5 PPM

• 25 PPM

• 0.25 PPM

What is the main difference in approach between the two examples?

• The first example involves a conversion, the second does not

• The first example uses a different formula

• The second example involves a conversion, the first does not

• The first example uses volume, the second uses mass