🔍 Key Concepts

• Always add acid to water, never water to acid due to heat and splattering risk • Material compatibility of containers with sulfuric acid (common battery acid) • Why metal containers react with acid compared to inert containers like glass or certain plastics

💭 Think About

• Think about what happens when acid is diluted: which component should be added to which to control the heat of reaction and reduce splashing? • Consider how sulfuric acid would react with a zinc-plated metal container versus a glass container. Which one is more chemically inert? • Visualize a safe battery shop procedure: what kind of container do technicians normally use when preparing or handling electrolyte?

✅ Before You Answer

• Verify which procedure is recommended in basic chemistry safety rules: acid into water vs. water into acid • Check which container material is non-reactive with strong acids in standard lab or battery servicing practice • Eliminate any option that involves adding water to acid or using a metal container with sulfuric acid if that would cause a reaction or hazard