As the electrolyte level in the cells of a...

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Question 1 of 205eccefa3bacbc34ba4d4801f

As the electrolyte level in the cells of a lead-acid battery evaporates over time, what will tend to happen to the specific gravity of the electrolyte in the cells as the level drops due to evaporation?

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🔍 Key Concepts

• Lead-acid battery electrolyte is a mixture of sulfuric acid and water • Specific gravity compares the density of a liquid to the density of pure water • Relative volatility (which part evaporates more easily: water or sulfuric acid?)

💭 Think About

• In normal ambient conditions, which component of the electrolyte is more likely to evaporate: the water or the sulfuric acid? • If the liquid that evaporates is less dense than the liquid that remains, what happens to the overall specific gravity of the remaining solution? • Think about what happens to a pot of salty water when you slowly boil away the water—how does the concentration of the dissolved substance change?

✅ Before You Answer

• Be clear on which component of the electrolyte is more volatile under normal conditions • Remember that sulfuric acid is denser than water, so increasing its proportion changes specific gravity in a predictable way • Check each choice for whether it correctly matches: (1) which component evaporates, and (2) the resulting direction of change in specific gravity

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