Suitable Apparatus for Measuring CO2 Evolution Rate

Steps:

• Reaction produces CO2 gas; rate measured by volume of gas collected or mass loss over time using stopwatch.
• Set 1 (gas syringe): directly measures CO2 volume displacement, plotting volume vs. time gives rate.
• Set 2 (balance): tracks mass decrease due to CO2 escape, plotting mass vs. time gives rate.
• Set 3 (inverted tube or similar): lacks precise volume/mass measurement, unsuitable for quantitative rate data.

Why B is correct:

• Sets 1 and 2 enable quantitative tracking of product formation per rate definition (change in amount over time), allowing rate curves.

Why the others are wrong:

• A includes unsuitable Set 3, leading to inaccurate data.
• C omits Set 1, missing a valid volume method.
• D includes unsuitable Set 3 and omits Set 1.

Final answer: B