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Magnesium Sulfate Solution for Barium Poisoning Treatment

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Magnesium Sulfate Solution for Barium Poisoning Treatment

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Questions and Answers

What is the purpose of adding an excess of sulfuric acid in the experiment described?

To quantify the volume of carbon dioxide evolved

To remove impurities from the calamine lotion

To accelerate the reaction between zinc compounds and sulfuric acid (correct)

To neutralize the zinc compounds

What does the chemist aim to achieve by plotting a graph of the volume of carbon dioxide evolved against time?

To determine the color change due to the reaction

To identify the presence of impurities in the calamine lotion

To observe any changes in temperature during the reaction

To analyze the rate of reaction between zinc compounds and sulfuric acid (correct)

Why is it important to draw a best-fit curve through all the points on the graph?

To highlight outliers in the data

To ensure accuracy in determining the volume of carbon dioxide evolved (correct)

To estimate the total mass of zinc present in the sample

To speed up the completion of the reaction

What does a flat portion in the graph of volume against time indicate?

Complete reaction has occurred Signup and view all the answers

What could be a possible reason for a deviation from an ideal curve in the graph?

Temperature fluctuations during the experiment Signup and view all the answers

Why is it crucial to measure the volume of carbon dioxide at specific time intervals?

To monitor the progress of the reaction over time Signup and view all the answers

In what form are zinc carbonate and zinc oxide present in calamine lotion?

In suspension in water Signup and view all the answers

What is an implication of using a 20.0 cm3 sample size in the experiment?

Reduced accuracy in measuring carbon dioxide volume Signup and view all the answers

How does adding distilled water to calamine lotion impact its composition?

"Dilutes" its potency by reducing zinc concentration Signup and view all the answers

What is a possible consequence if barium chloride was used instead of sulfuric acid in this experiment?

Formation of toxic barium carbonate gas Signup and view all the answers