A student adds excess large pieces of magnesium carbonate, $$\(\mathrm{MgCO}_{3}\)$$, to dilute hydrochloric acid, $$\(\mathrm{HCl}\)$$, and measures the volume of carbon dioxide gas, $$\(\mathrm{CO}_{2}\)$$, given off. The graph shows how the volume of carbon dioxide gas changes with time. The student repeats the experiment using powdered $$\(\mathrm{MgCO}_{3}\)$$ instead of large pieces. All other conditions stay the same. On the grid, draw the line expected when powdered $$\(\mathrm{MgCO}_{3}\)$$ is used instead of large pieces.

Chemistry
IGCSE&ALevel
CAIE
Exam No:0620_m22_qp_42 Year:2022 Question No:2(d)(iii)

Answer:

a new line steeper than printed line and starts at origin and levels off earlier than printed line
levels off at the same volume

Knowledge points:

6.2.1.3. changing the surface area of solids
6.2.4. Interpret data, including graphs, from rate of reaction experiments

Solution:

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