Question detail
Chemical changes case 133 acid-base-boundary. A student sorts acid, alkali and base statements. Which option keeps the terms distinct? Focus on the salt produced when hydrochloric acid reacts with in Reactions of acids with metals, not on a neighbouring Unit 4.4 reaction idea.
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. Chemical changes case 133 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for the salt produced when hydrochloric acid reacts with
- B. Chemical changes case 133 acid-base-boundary: Treats every base as an alkali without checking solubility (Reactions of acids with metals)
- C. Chemical changes case 133 acid-base-boundary: Uses pH wording but does not identify the acid-base role (the salt produced when hydrochloric acid reacts with)
- D. Chemical changes case 133 acid-base-boundary: Names a salt product without explaining the reaction context (Reactions of acids)
Answer
The correct option is Chemical changes case 133 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for the salt produced when hydrochloric acid reacts with.
Explanation
The correct option is Chemical changes case 133 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for the salt produced when hydrochloric acid reacts with. It is correct because it directly supports the approved learning objective to predict the salt produced when hydrochloric acid reacts with a metal in Reactions of acids with metals. The other options are incorrect because they blur a Unit 4.4 concept boundary: acid versus alkali versus base, oxidation versus reduction, displacement versus reduction, electrolysis versus electroplating, anode versus cathode, positive versus negative ions, oxidation state versus ionic charge, or strong acid versus concentrated acid.
Common mistake
Common Mistake in Predicting Salts
Students often confuse the metal used in the reaction with the salt produced, predicting the wrong salt name.
To fix this, remember that the salt produced from hydrochloric acid will always be named after the metal and will be a chloride. For example, if zinc reacts with hydrochloric acid, the salt produced is zinc chloride.
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