Normality and Equivalent Mass Calculations

The video tutorial explains the concept of normality, a unit of concentration in solutions, defined as the number of gram equivalents of solute per liter of solution. It covers the mathematical formula for normality, its temperature dependence, and provides a detailed example using sulfuric acid. The tutorial also explains how to calculate the gram equivalent of a solute and concludes with a summary.

What is the unit of normality?

• Grams per liter

• Gram equivalents per liter

• Moles per liter

• Liters per mole

How is the gram equivalent of a solute calculated?

• Mass of solute divided by molar mass

• Mass of solute divided by equivalent mass

• Molar mass divided by mass of solute

• Equivalent mass divided by mass of solute

Why does normality change with temperature?

• Because solute mass changes with temperature

• Because volume is directly proportional to temperature

• Because equivalent mass changes with temperature

• Because density changes with temperature

In the example problem, what is the percentage by weight of H2SO4 in the solution?

• 10%

• 15%

• 25%

• 20%

What is the molar mass of H2SO4 used in the example problem?

• 98 g/mol

• 49 g/mol

• 32 g/mol

• 64 g/mol

What is the n factor of H2SO4 in the example problem?

• 4

• 3

• 1

• 2

How is the volume of the solution calculated in the example problem?

• Density multiplied by mass

• Molar mass divided by density

• Mass divided by density

• Density divided by mass

What is the final normality of the solution in the example problem?

• 4.36 N

• 5.36 N

• 3.36 N

• 2.36 N

What is the equivalent mass of H2SO4 in the example problem?

• 49 g

• 98 g

• 64 g

• 32 g

What is the formula used to calculate normality when volume is in milliliters?

• Number of gram equivalents divided by volume in milliliters

• Number of gram equivalents divided by volume in liters

• Number of gram equivalents divided by volume in milliliters multiplied by 1000

• Number of gram equivalents multiplied by volume in milliliters