Calculating Concentration in ppm

This video tutorial covers the concept of parts per million (ppm) as a measure of solution concentration, particularly for small concentrations like pollutants. It explains the terms solute, solvent, and solution, and demonstrates ppm calculations through examples involving lead and zinc in water. The video encourages viewers to practice these calculations and provides links for further learning.

What is the primary use of parts per million (ppm) calculations?

• To measure large concentrations of substances

• To determine the boiling point of a liquid

• To measure small concentrations like pollutants

• To calculate the density of a solution

In a solution, what is the role of the solute?

• It is the substance that forms the majority of the solution

• It is the substance that dissolves in the solvent

• It is the substance that evaporates

• It is the substance that remains undissolved

How is the concentration in parts per million (ppm) calculated?

• Grams of solute divided by 1 million grams of solution

• Grams of solute divided by grams of solvent

• Grams of solution divided by grams of solute

• Grams of solvent divided by grams of solute

In the example of lead in drinking water, what is the concentration of lead in ppm?

• 133.3 ppm

• 150 ppm

• 0.02 ppm

• 100 ppm

What is the first step in solving a ppm calculation problem?

• Determine the temperature of the solution

• Convert all units to liters

• Identify the solute and the solution

• Calculate the molarity

In the zinc example, why is it necessary to convert milligrams to grams?

• To make the solute heavier

• To increase the accuracy of the result

• To match the units of the solution

• To simplify the calculation

What is the concentration of zinc in ppm after conversion and calculation?

• 0.0034 ppm

• 500 ppm

• 6.8 ppm

• 3.4 ppm

What is the final step in calculating ppm?

• Add the solute and solvent quantities

• Perform cross multiplication

• Subtract the solute from the solution

• Convert grams to milligrams

What should you do if you find ppm calculations challenging?

• Ask someone else to solve it

• Ignore the problem

• Skip to another topic

• Repeat the video and practice more

What is encouraged at the end of the video?

• To ignore the video

• To subscribe and share the video

• To take a break

• To memorize all formulas