Photo AI

This question is about vanadium compounds and ions - AQA - A-Level Chemistry - Question 9 - 2018 - Paper 1

Question icon

Question 9

This-question-is-about-vanadium-compounds-and-ions-AQA-A-Level Chemistry-Question 9-2018-Paper 1.png

This question is about vanadium compounds and ions. Use data from Table 4 to identify the species that can be used to reduce VO₄²⁻ ions to VO₃⁻ in aqueous solution a... show full transcript

Worked Solution & Example Answer:This question is about vanadium compounds and ions - AQA - A-Level Chemistry - Question 9 - 2018 - Paper 1

Step 1

Identify the suitable reducing agent

96%

114 rated

Answer

From Table 4, VO₄²⁻ can be reduced to VO₃⁻, which has a standard electrode potential (E°) of +1.00 V. The species capable of reducing VO₄²⁻ should have a higher E° value. Considering the listed species, Cl₂ has an E° of +1.36 V, making it the best candidate for the reduction.

Step 2

Explain why the chosen species can reduce VO₄²⁻

99%

104 rated

Answer

The reaction favorability can be assessed using the standard electrode potentials. A species with a more positive E° value indicates a greater tendency to gain electrons, thus functioning as a stronger oxidizing agent. Cl₂, with E° = +1.36 V, can effectively reduce VO₄²⁻ to VO₃⁻ as it exceeds the potential of the VO₄²⁻/VO₃⁻ couple.

Join the A-Level students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

Other A-Level Chemistry topics to explore

Atomic Structure

Chemistry - AQA

Formulae, Equations & Calculations

Chemistry - AQA

The Mole, Avogadro & The Ideal Gas Equation

Chemistry - AQA

Types of Bonding & Properties

Chemistry - AQA

Molecules: Shapes & Forces

Chemistry - AQA

Energetics

Chemistry - AQA

Kinetics

Chemistry - AQA

Chemical Equilibria, Le Chateliers Principle & Kc

Chemistry - AQA

Oxidation, Reduction & Redox Equations

Chemistry - AQA

Periodicity

Chemistry - AQA

Group 2, the Alkaline Earth Metals

Chemistry - AQA

Group 7 (17), the Halogens

Chemistry - AQA

Introduction to Organic Chemistry

Chemistry - AQA

Alkanes

Chemistry - AQA

Halogenoalkanes

Chemistry - AQA

Alkenes

Chemistry - AQA

Alcohols

Chemistry - AQA

Organic Analysis

Chemistry - AQA

Organic & Inorganic Chemistry Practicals

Chemistry - AQA

Thermodynamics

Chemistry - AQA

Rate Equations

Chemistry - AQA

Equilibrium constant (Kp) for Homogeneous Systems

Chemistry - AQA

Electrode Potentials & Electrochemical Cells

Chemistry - AQA

Fundamentals of Acids & Bases

Chemistry - AQA

Further Acids & Bases Calculations

Chemistry - AQA

Properties of Period 3 Elements & their Oxides

Chemistry - AQA

Transition Metals

Chemistry - AQA

Reactions of Ions in Aqueous Solution

Chemistry - AQA

Optical Isomerism

Chemistry - AQA

Aldehydes & Ketones

Chemistry - AQA

Carboxylic Acids & Derivatives

Chemistry - AQA

Aromatic Chemistry

Chemistry - AQA

Amines

Chemistry - AQA

Polymers

Chemistry - AQA

Amino acids, Proteins & DNA

Chemistry - AQA

Organic Synthesis

Chemistry - AQA

Organic Mechanisms

Chemistry - AQA

Nuclear Magnetic Resonance Spectroscopy

Chemistry - AQA

Chromatography

Chemistry - AQA

Physical Chemistry Practicals

Chemistry - AQA

Organic Chemistry Practicals

Chemistry - AQA

;