Unit 4 AOS 2 - Redox Titrations Quiz (2)

Which of the following is a primary standard used in redox titrations?

• Sodium chloride

• Potassium permanganate

• Sodium hydroxide

• Oxalic acid

In a redox titration, what is the purpose of a standard solution?

• To act as a solvent

• To provide a known concentration for comparison

• To neutralise the solution

• To change the colour of the solution

What is the molarity of a solution if 0.5 moles of solute are dissolved in 2 litres of solution?

• 0.25 M

• 0.5 M

• 1 M

• 2 M

Which of the following is an example of a redox reaction involving an organic compound?

• Combustion of methane

• Neutralisation of hydrochloric acid with sodium hydroxide

• Dissolution of sugar in water

• Precipitation of silver chloride

In volumetric analysis, what is the role of an indicator?

• To increase the reaction rate

• To provide a colour change at the endpoint

• To act as a catalyst

• To dissolve the solute

Calculate the number of moles in 250 mL of a 0.1 M solution.

• 0.025 moles

• 0.05 moles

• 0.1 moles

• 0.25 moles

What is the primary standard used in the standardisation of sodium thiosulfate solution?

• Potassium dichromate

• Sodium chloride

• Potassium iodate

• Oxalic acid

Which of the following is NOT a characteristic of a primary standard?

• High purity

• Stable in air

• High reactivity

• Known formula

In a redox titration, what is the equivalence point?

• The point where the solution changes colour

• The point where the moles of oxidant equal the moles of reductant

• The point where the solution reaches its maximum concentration

• The point where the solution becomes neutral

What is the molarity of a solution prepared by diluting 50 mL of 2 M HCl to a final volume of 200 mL?

• 0.25 M

• 0.5 M

• 1 M

• 2 M