The speed of a specific chemical reaction depends directly on the square of the concentration of chemical A and inversely on the concentration of chemical B. If the concentration of chemical B is doubled, what is the closest percent change in the concentration of chemical A needed to maintain the same reaction speed?

Answer Choices

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100% decrease

50% decrease

40% decrease

40% increase

Correct

50% increase

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The speed of a specific chemical reaction is directly related to the square of the concentration of chemical A and inversely related to the concentration of chemical B. When the concentration of chemical B is doubled, we need to determine the percent change in the concentration of chemical A to keep the reaction speed constant. Since B…

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What this question tests

What it tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Common trap

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.