Converting Molarity and Concentration

This video tutorial explains how to convert between different types of concentration, specifically from parts per million (PPM) to molarity and vice versa. It provides a detailed example using sodium hydroxide to demonstrate the conversion from PPM to molarity, including the use of molar mass and density. The video also covers converting molarity to PPM with a potassium iodide example and explains how to convert molarity to parts per billion (PPB).

What is the main focus of this video tutorial?

• Converting molarity to parts per billion

• Converting parts per million to molarity

• Calculating density

• Understanding atomic mass

What does parts per million (ppm) represent?

• Solutions with very low concentrations

• The density of a solution

• Solutions with high concentrations

• The molar mass of a solute

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

• Moles of solute divided by liters of solution times 10^6

• Grams of solute divided by grams of solution times 10^6

• Moles of solute divided by grams of solution

• Grams of solute divided by liters of solution

What is the molar mass of sodium hydroxide (NaOH) used in the conversion?

• 40 grams per mole

• 1.008 grams per mole

• 16 grams per mole

• 22.99 grams per mole

What is the density of the solution used in the conversion from ppm to molarity?

• 1.10 grams per milliliter

• 1.03 grams per milliliter

• 1.00 grams per milliliter

• 1.05 grams per milliliter

In the example problem, what is the molarity of the potassium iodide solution?

• 0.004 M

• 0.004 ppm

• 0.004 ppb

• 0.004 g/L

What is the molar mass of potassium iodide (KI) used in the example problem?

• 100 grams per mole

• 166 grams per mole

• 39.1 grams per mole

• 126 grams per mole

How do you convert from molarity to parts per million (ppm)?

• Multiply by 10^9

• Divide by 10^9

• Divide by 10^6

• Multiply by 10^6

What is the relationship between parts per million (ppm) and parts per billion (ppb)?

• 1 ppm is equal to 10000 ppb

• 1 ppm is equal to 100 ppb

• 1 ppm is equal to 1000 ppb

• 1 ppm is equal to 10 ppb

How do you convert from molarity to parts per billion (ppb)?

• Use 10^9 in the formula

• Use 10^6 in the formula

• Multiply by 10^3

• Divide by 10^3