🔍 Key Concepts

• Lead-acid battery construction (plates, electrolyte, container) • Difference between concentrated and dilute sulfuric acid in practical use • How state of charge affects the specific gravity of the electrolyte

💭 Think About

• Think about what would be safe and practical inside an engine room battery bank: would you really use highly concentrated acid, or something less aggressive? • Recall typical specific gravity values for a fully charged lead-acid cell and how they compare to pure water (1.000). • Consider whether more than one of the answer choices can be true at the same time, and what that would mean for option D.

✅ Before You Answer

• Verify what the electrolyte mixture in a standard marine lead-acid storage battery is (water + sulfuric acid, and in what general strength). • Recall the approximate specific gravity of the electrolyte when fully charged versus discharged (around 1.1–1.3 range—where does a fully charged cell sit?). • Check whether choices B and C can both correctly describe the electrolyte of a fully charged, normal lead-acid storage cell.