Tina is learning about the concept of acids and bases. She knows that according to the Bronsted-Lowry concept, an acid is a proton donor. Which of the following is an acid in the reaction: H2O + CO3^2- → HCO3- + OH-?

Which of the following is a characteristic of equilibrium?

Vera is studying dynamic equilibrium. She understands that at equilibrium, the concentrations of reactants and products are constant. What does this imply about the rate of the forward and reverse reactions?

Which of the following is an acidic oxide?

Rania is studying the conditions for equilibrium. She understands that the system must be closed. What is a characteristic of a closed system?

Which substance is a strong base?

Which condition is necessary for equilibrium to be established?

The pH scale ranges from:

According to the law of mass action, the rate of reaction is proportional to:

David is studying the concept of chemical equilibrium. He learns that it is a dynamic process. What does 'dynamic' mean in the context of chemical equilibrium?

Yara is learning about chemical equilibrium. She understands that equilibrium constants are used to describe the equilibrium position. What does a large equilibrium constant (K >> 1) indicate?

Which indicator gives different colors at different pH values?

Waleed is learning about the conditions for equilibrium. He knows that the reaction must be reversible and the system must be closed. Which of the following is also required for equilibrium?

Which salt is commonly known as table salt?

The equilibrium constant expression includes:

Acids turn blue litmus paper:

According to Lewis theory, an acid is an:

Ahmed is learning about reversible reactions in his chemistry class. His teacher explains that in a reversible reaction, the products can react to form the original reactants. Which of the following represents a reversible reaction?

Julia is learning about oxides. She knows that neutral oxides do not react with acids or bases. Which of the following is a neutral oxide?

Which indicator turns red in acidic solution?

Which property is common in bases?

Which base is used as antacid?

Zayn is studying reversible reactions. He learns that the esterification reaction (acid + alcohol ⇌ ester + water) is reversible. What happens if water is removed from the system?

Zayn is studying chemical equilibrium. He learns that the equilibrium constant (K) for a reaction is constant at a given temperature. If K is very large, what does it indicate about the reaction?

Emma is learning about strong and weak acids. She knows that strong acids completely ionize in water, while weak acids partially ionize. Which of the following is a strong acid?

Equilibrium can be disturbed by changing:

A solution with pH value 7 is:

Neutralization reaction occurs between:

Which factor affects equilibrium in gaseous reactions only?

Khalid is studying acidic oxides. He knows that acidic oxides react with water to form acids. Which of the following is an acidic oxide?