10 Questions
What is the purpose of adding an excess of sulfuric acid in the experiment described?
To accelerate the reaction between zinc compounds and sulfuric acid
What does the chemist aim to achieve by plotting a graph of the volume of carbon dioxide evolved against time?
To analyze the rate of reaction between zinc compounds and sulfuric acid
Why is it important to draw a best-fit curve through all the points on the graph?
To ensure accuracy in determining the volume of carbon dioxide evolved
What does a flat portion in the graph of volume against time indicate?
Complete reaction has occurred
What could be a possible reason for a deviation from an ideal curve in the graph?
Temperature fluctuations during the experiment
Why is it crucial to measure the volume of carbon dioxide at specific time intervals?
To monitor the progress of the reaction over time
In what form are zinc carbonate and zinc oxide present in calamine lotion?
In suspension in water
What is an implication of using a 20.0 cm3 sample size in the experiment?
Reduced accuracy in measuring carbon dioxide volume
How does adding distilled water to calamine lotion impact its composition?
"Dilutes" its potency by reducing zinc concentration
What is a possible consequence if barium chloride was used instead of sulfuric acid in this experiment?
Formation of toxic barium carbonate gas
Learn about the effectiveness of drinking magnesium sulfate solution in the treatment of barium poisoning and how it helps. Explore the reasons behind using this solution to counteract barium toxicity.
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