Balancing Chemical Reactions and Solubility

The video tutorial explains how to balance the chemical equation for the reaction between potassium phosphate (K3PO4) and aluminum sulfate (Al2(SO4)3). It highlights the importance of recognizing polyatomic ions on both sides of the equation to simplify the balancing process. The tutorial provides a step-by-step guide to balancing the equation, emphasizing the use of polyatomic ions as single units. The reaction results in a precipitate, aluminum phosphate (AlPO4), which is insoluble in water. The video concludes with a summary of the balanced equation and the reaction's outcome.

What is the state of aluminum phosphate in the reaction?

• Solid

• Aqueous

• Gas

• Liquid

Why is it useful to treat polyatomic ions as single units when balancing equations?

• It makes the equation more complex.

• It increases the number of atoms.

• It simplifies the balancing process.

• It changes the chemical properties.

What is the first ion to be balanced in the equation?

• Aluminum

• Sulfate

• Phosphate

• Potassium

How many potassium atoms are there after balancing the equation?

• 6

• 3

• 2

• 4

What is the coefficient of aluminum sulfate in the balanced equation?

• 1

• 2

• 3

• 4

How many aluminum atoms are present on the product side after balancing?

• 1

• 3

• 2

• 4

What is the final balanced equation for the reaction?

• K3PO4 + 2 Al2(SO4)3 → 3 AlPO4 + 6 K2SO4

• 3 K3PO4 + Al2(SO4)3 → 3 AlPO4 + 2 K2SO4

• 2 K3PO4 + Al2(SO4)3 → 2 AlPO4 + 3 K2SO4

• K3PO4 + Al2(SO4)3 → AlPO4 + K2SO4

What happens to the precipitate formed in the reaction?

• It reacts with air.

• It dissolves in water.

• It falls to the bottom of the test tube.

• It evaporates.

Which compounds are soluble in water in this reaction?

• Only K3PO4

• Only Al2(SO4)3

• K3PO4 and Al2(SO4)3

• AlPO4

What is the role of solubility rules in this reaction?

• To balance the equation.

• To change the reaction temperature.

• To identify the precipitate.

• To determine the color of the compounds.