Creating One Molar Hydrochloric Acid Solutions

Dr. B explains three methods to prepare a one molar hydrochloric acid solution. The first method involves using a recipe provided with concentrated HCl, requiring 83 ml of 12 molar HCl to be diluted to one liter. The second method uses a molarity equation to calculate the required volume of concentrated HCl. The third method involves using a stock solution with a different concentration, such as 6 molar, to achieve the desired molarity. Dr. B emphasizes the simplicity of these methods over using specific gravity and density.

What is the main topic of Dr. B's video?

• Different types of acids

• Three methods to create a one molar solution of hydrochloric acid

• Safety precautions when handling acids

• The history of hydrochloric acid

What is the first step in using a recipe to make a one molar solution of hydrochloric acid?

• Measure the temperature of the acid

• Add water to the flask first

• Add concentrated acid directly to the flask

• Calculate the density of the acid

How much concentrated hydrochloric acid is needed to make one liter of a one molar solution?

• 120 milliliters

• 83 milliliters

• 50 milliliters

• 100 milliliters

What equation is used to determine the volume of concentrated acid needed for dilution?

• V1 = C1/C2

• V1 = V2/C1

• V1 = 1/12

• V1 = M1/M2

What is the approximate volume in liters when V1 equals 1/12?

• 0.083 liters

• 0.12 liters

• 0.5 liters

• 1 liter

How many milliliters of concentrated acid are needed to make 250 milliliters of a 0.5 molar solution?

• 20.8 milliliters

• 5.2 milliliters

• 15.6 milliliters

• 10.4 milliliters

What is the third method for making a one molar solution?

• Using a stock solution with a different concentration

• Using a digital scale

• Using a pH meter

• Using a thermometer

What concentration is suggested for the stock solution in the third method?

• 0.5 molar

• 1 molar

• 6 molar

• 12 molar

What alternative methods are mentioned for making these calculations?

• Using a ruler

• Using a computer program

• Using a calculator

• Using specific gravity and density