Answer :
Final answer:
The largest percentage of automotive battery electrolyte is sulfuric acid, typically making up about 37% of the solution by mass. Water is present but in a lesser amount. This composition is essential for the battery's operation.
Explanation:
The Largest Percentage of Automotive Battery Electrolyte
In automotive lead-acid batteries, the electrolyte is predominantly made up of sulfuric acid. A typical lead-acid battery solution contains about 37% sulfuric acid by mass, with the remaining percentage being water. This mixture is crucial for the battery's function, allowing the chemical reactions that produce electricity to occur.
While water is a significant component of the electrolyte solution, it is always present in lower quantities compared to sulfuric acid. For example, when the battery discharges, the electrolyte loses some sulfuric acid and becomes more diluted, approaching a state closer to pure water, but initially, sulfuric acid dominates.
Conclusion
Thus, the correct answer to the question is sulfuric acid, as it comprises the largest percentage of the battery electrolyte.
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