Question detail
When hydrochloric acid reacts with magnesium, what gas is released and how can it be tested?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Reactions of acids
Question
When hydrochloric acid reacts with magnesium, what gas is released and how can it be tested?
Answer
Hydrogen gas is released during the reaction, and it can be tested using a lighted splint, which produces a 'pop' sound.
Explanation
This question assesses the student's knowledge of the products of acid-metal reactions and the method to test for hydrogen gas. It requires an understanding of both the chemical reaction and the practical application of testing for gases.
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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