Question detail
For The pH scale and neutralisation, which acid-base focus answer best supports this Unit 4.4 objective: Write the ionic equation H+ + OH- -> H2O for neutralisation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of acids
Question
- A. It changes color to show the acidity or alkalinity of a solution. - correct acid-base focus for neutral
- B. Wrong acid-base focus: confuses neutral with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for The pH scale and neutralisation
- D. Wrong reaction link: does not support Write the ionic equation H+ + OH- -> H2O for neutralisation
Answer
The correct option is It changes color to show the acidity or alkalinity of a solution. - correct acid-base focus for neutral.
Explanation
The correct option is "It changes color to show the acidity or alkalinity of a solution. - correct acid-base focus for neutral" because it supports the approved learning objective: Write the ionic equation H+ + OH- -> H2O for neutralisation. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for The pH scale and neutralisation.
Common mistake
Common Mistake in Writing Ionic Equations
Students often forget to include the correct charges on the ions when writing the ionic equation for neutralisation.
Always ensure to write the ionic equation with the correct charges, such as H+ for hydrogen ions and OH- for hydroxide ions.
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