Titration Calculations: Understanding Concentration and Molar Concentration

This video tutorial covers the concepts of concentration and molar concentration. It explains how to calculate concentration using mass and volume, and provides examples with sodium chloride. The tutorial then introduces molar concentration, explaining the concept of a mole and how to calculate molar mass using the periodic table. It provides examples with magnesium sulfate and sodium hydroxide, demonstrating how to convert mass into moles and calculate molar concentration.

What is the concentration of a solution if 10 grams of sodium chloride is dissolved in 0.5 decimeters cubed of water?

• 25 grams per decimeter cubed

• 20 grams per decimeter cubed

• 10 grams per decimeter cubed

• 5 grams per decimeter cubed

If the concentration of a solution is 50 grams per decimeter cubed and the volume is 0.2 decimeters cubed, what is the amount of substance present?

• 5 grams

• 10 grams

• 20 grams

• 15 grams

What is the value of a mole in terms of the number of molecules?

• 6.0 x 10^22

• 6.0 x 10^25

• 6.0 x 10^23

• 6.0 x 10^24

How do you calculate the relative molecular mass of a compound?

• By adding the atomic masses of all atoms

• By adding the atomic numbers of all atoms

• By dividing the atomic masses of all atoms

• By multiplying the atomic masses of all atoms

What is the relative molecular mass of magnesium sulfate (MgSO4)?

• 110 grams per mole

• 100 grams per mole

• 130 grams per mole

• 120 grams per mole

How many moles are present in 180 grams of magnesium sulfate if its relative molecular mass is 120 grams per mole?

• 1.0 moles

• 1.5 moles

• 2.0 moles

• 2.5 moles

What is the molar concentration of a solution if 3 moles of sodium hydroxide are dissolved in 1 decimeter cubed of water?

• 4 moles per decimeter cubed

• 3 moles per decimeter cubed

• 2 moles per decimeter cubed

• 1 mole per decimeter cubed