Net Ionic Equations and Sorbic Acid

The video tutorial explains the properties and uses of potassium sorbate, including its molar mass and significance in diet soft drinks. It covers the preparation of a stock solution and the titration process using hydrochloric acid. The tutorial then delves into writing ionic and net ionic equations, illustrating the dissociation of compounds in aqueous solutions and the formation of sorbic acid.

What is the molar mass of potassium sorbate?

• 200 grams per mole

• 150 grams per mole

• 100 grams per mole

• 250 grams per mole

In what type of products is potassium sorbate commonly used as a preservative?

• Diet soft drinks

• Bottled water

• Fruit juices

• Energy drinks

What is the concentration of hydrochloric acid used in the titration?

• 0.5 molar

• 2.0 molar

• 1.0 molar

• 1.25 molar

What is the value of Ka for sorbic acid?

• 1.7 x 10^-5

• 1.7 x 10^-3

• 1.7 x 10^-4

• 1.7 x 10^-6

What happens to compounds in an aqueous solution in terms of ions?

• They form a solid

• They evaporate

• They disassociate into ions

• They remain intact

Which ions are considered spectator ions in the reaction?

• Potassium and chloride ions

• Sorbic acid ions

• Hydrochloric acid ions

• Hydrogen and sorbate ions

What is the net ionic equation for the reaction?

• HCl + K+ -> KCl + H+

• K+ + Cl- -> KCl

• C6H7O2 + H+ -> HC6H7O2

• C6H7O2 + Cl- -> HC6H7O2

What is the role of the hydrogen proton in the net ionic equation?

• It remains unchanged

• It evaporates

• It reacts with sorbate ion

• It forms a solid

What is the chemical formula for sorbic acid?

• HC6H8O2

• C6H6O2

• C6H8O2

• HC6H7O2

Why are potassium and chloride ions not included in the net ionic equation?

• They are not present

• They form a gas

• They are spectator ions

• They are not reactive