Question detail
Which method best shows safe handling when transferring dilute hydrochloric acid into a conical flask?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
AS practical skills and required practical activities
Question
- A. A. Check the label, wear eye protection, use a pipette filler or measuring cylinder, and keep the bottle capped when not in use.
- B. B. Mouth-pipette the acid slowly because dilute acids are low risk.
- C. C. Pour from shoulder height so the meniscus can be seen more clearly.
- D. D. Return any unused acid from the flask to the stock bottle to avoid waste.
Answer
A. Check the label, wear eye protection, use a pipette filler or measuring cylinder, and keep the bottle capped when not in use.
Explanation
This is the safe choice because dilute acid can still irritate eyes and skin, and practical accuracy depends on controlled transfer. A pipette filler or measuring cylinder avoids mouth pipetting, the label check prevents reagent errors, and capping the bottle reduces spills and contamination. Returning used acid to stock is poor chemical practice. This directly supports the learning objective to handle solids and liquids safely, including hazardous substances, because it links safe transfer, labelling, exposure control and contamination control to the practical context.
Common mistake
Improper Handling of Hazardous Substances
Students often forget to wear appropriate personal protective equipment (PPE) when handling hazardous solids and liquids, leading to safety risks.
Always wear gloves, goggles, and a lab coat when handling hazardous substances. This ensures safety and minimizes exposure to harmful chemicals.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.