Understanding Parts Per Million (PPM)

The video tutorial explains the concept of parts per million (PPM), a unit of concentration used for extremely dilute solutions, often in drinking water supplies. It covers three types of problems: calculating PPM of a salt solution, finding the grams of salt in a given PPM solution, and determining the amount of solution needed for a specific amount of salt. Each problem is solved step-by-step, demonstrating the calculations involved.

What is the formula for calculating parts per million (PPM)?

• Grams of solute divided by grams of solution, multiplied by a thousand

• Grams of solution divided by grams of solute, multiplied by a thousand

• Grams of solution divided by grams of solute, multiplied by a million

• Grams of solute divided by grams of solution, multiplied by a million

In what context is PPM commonly used?

• To measure the concentration of hazardous chemicals in drinking water

• To calculate the density of a solid

• To measure the viscosity of a fluid

• To determine the boiling point of a liquid

If you have 0.15 grams of salt in 2500 grams of solution, what is the concentration in PPM?

• 600 PPM

• 0.6 PPM

• 6 PPM

• 60 PPM

What is the PPM of a solution with 0.15 grams of solute in 2500 grams of solution?

• 60 PPM

• 0.6 PPM

• 6 PPM

• 600 PPM

How many grams of salt are in a 35,000 gram solution with a concentration of 210 PPM?

• 735 grams

• 0.735 grams

• 73.5 grams

• 7.35 grams

What does a concentration of 210 PPM mean in terms of grams of solute per million grams of solution?

• 210 grams of solute per million grams of solution

• 21 grams of solute per million grams of solution

• 2.1 grams of solute per million grams of solution

• 0.21 grams of solute per million grams of solution

If you have 10 grams of salt in a 210 PPM solution, how many grams of solution are needed?

• 47,619 grams

• 4,761.9 grams

• 476,190 grams

• 476.19 grams

How many grams of solution are required to contain 10 grams of salt in a 210 PPM solution?

• 47,619 grams

• 476.19 grams

• 476,190 grams

• 4,761.9 grams

What is the purpose of using a conversion factor in PPM calculations?

• To convert PPM to percentage

• To convert grams of solution to grams of solute

• To convert percentage to PPM

• To convert grams of solute to grams of solution

What is the significance of the number 'one million' in the PPM formula?

• It scales the ratio to parts per million

• It converts grams to kilograms

• It adjusts for temperature changes

• It accounts for pressure differences