Question

In that same messy lab (which is not MCTC’s lab), the student finds two more unlabeled bottles that are either CO₂ or H₂. Based on their APPEARANCE recorded on page 2, how can she determine which substance is which? Do not answer with an activity that is more than looking at the bottles.

a. CO₂ appears colorless, while H₂ has a distinct color.
b. CO₂ appears to have a distinct color, while H₂ is colorless.
c. Both CO₂ and H₂ appear colorless.
d. Both CO₂ and H₂have a distinct color.

Answer 1

Both CO₂ and H₂ are colorless gases and cannot be differentiated based on appearance alone, emphasizing the importance of clear labeling and proper testing in the lab.

Step-by-step explanation:

The student is asking how to distinguish between bottles of carbon dioxide (CO₂) and hydrogen gas (H₂) based on their appearance. The correct answer is: c. Both CO₂ and H₂ appear colorless. These gases are both colorless and cannot be differentiated visually. This is why lab safety rules are so important: always label chemicals clearly to avoid confusion. In a situation where gases are mixed up or unlabeled, proper chemical testing should be conducted to determine their identity.