pH and Neutralisation

What is the correct chemical formula for the ions formed when acids dissolve in water?

• H⁺

• H^–

• OH⁺

• OH^–

What is the correct chemical formula for the ions formed when alkalis dissolve in water?

• OH^–

• H⁺

• H^–

• OH⁺

Which of the following pH values is that of a weak acid?

• pH 8

• pH 13

• pH 2

• pH 6

On the pH scale, what colour indicates a strong alkali?

• Yellow

• Purple

• Blue

• Red

Which of the following is the correct definition for the neutralisation equation?

• Water dissociates to produce hydroxide ions and hydrogen ions

• Hydroxide ions in the acid react with hydrogen ions in the alkali to produce water

• Hydrogen ions in the acid react with hydroxide ions in the alkali to produce hydrogen and oxygen

• Hydrogen ions in the acid react with hydroxide ions in the alkali to produce water

Which equipment is the best at measuring pH

• pH stick

• pH probe

• Universal indicator

• Litmus Paper

What is filtration?

• process of separating insoluble solid from a liquid

• process of removing water from a solution

• process of separating soluble solid from a liquid

What is evaporation?

• process of separating water from solution

• process of heating

• process of making crystals

When metals react, they lose electrons. This is...

• Reduction

• Oxidation

• Neither

When metals react they...

• Lose electrons

• Gain electrons

• Neither