Question detail

For Electrolysis, which industrial context statement most accurately matches this AQA Chemistry objective: Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied.

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Electrolysis

Question

A. Correct industrial-context: Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied. within Usin...
B. Distractor industrial-context A: confuses this with a different Electrolysis idea
C. Distractor industrial-context B: uses the right words but gives the wrong cause or condition
D. Distractor industrial-context C: answers a neighbouring objective instead of Using electrolysis to extract metals

Answer

The answer is Correct industrial-context: Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied. within Usin....

Explanation

The correct option is "Correct industrial-context: Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied. within Usin..." because it directly matches the learning objective in Using electrolysis to extract metals. The other options are wrong because they either switch to a neighbouring Electrolysis idea, reverse the chemistry relationship, or describe a condition that does not answer this objective.

Common mistake

Common Mistake in Half Equations

Students often confuse the half equations for aluminium ion reduction and oxide ion oxidation, mistakenly writing the wrong ions or charges.

To fix this, students should carefully review the charges of the ions involved: aluminium ions (Al^3+) gain three electrons to become aluminium (Al), while oxide ions (O^2-) lose two electrons to become oxygen (O2).

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move

For Using electrolysis to extract metals, which redox focus answer best supports this Unit 4.4 objective: (HT only) Write half equations for aluminium ion reduction and oxide ion oxidation when formulae and charges are supplied?