What would you use to neutralize spilled electrolyte from a nicad battery? [nicad batteries]

Question

BlackTom AI · Accepted Answer

Nickel‑cadmium (Ni‑Cd) batteries contain a strongly alkaline electrolyte, typically potassium hydroxide (KOH); therefore a weak acid is used to neutralize any spilled electrolyte. Boric acid (H3BO3) is the recommended neutralizer.

1) Relevant knowledge points and concepts
- Ni‑Cd electrolyte is alkaline (KOH), so neutralization requires an acid to consume OH−.
- A weak, non‑volatile, relatively safe acid (boric acid) is preferred for spill cleanup to avoid violent reactions, heat, or hazardous fumes.
- Neutralization chemistry: acid + base → salt (borate) and the hydroxide is consumed (OH− converted to less hazardous species).

2) Step‑by‑step reasoning
- Identify the spilled substance: KOH (strong base) from a Ni‑Cd battery.
- Choose an acid safe for cleanup: strong acids (like sulfuric acid) can react vigorously with a strong base, generating heat and splashes, increasing hazard.
- Boric acid reacts gently with hydroxide, forming borate ions and neutralizing alkalinity without excessive heat or corrosive fumes.

3) Reaction/intermediate steps (chemical rationale)
- Simplified reaction concept: H3BO3 (aq) + OH− → B(OH)4− (aqueous borate ion). With K+ present, a potassium borate salt is formed. This process removes OH−, lowering pH toward neutral.

4) Why the correct answer is correct
- Boric acid is a weak, readily available acid used specifically for neutralizing alkaline battery electrolyte because it neutralizes KOH safely and controllably, minimizing splattering and heat.

5) Why the other options are incorrect
- Sulphuric acid: a strong acid; its addition to concentrated KOH can produce vigorous, exothermic reactions and dangerous splashes — inappropriate for spill neutralization.
- Potassium hydroxide: this is the spilled alkali itself; adding more KOH would worsen the spill.
- Distilled water: dilutes the spill but does not neutralize alkalinity and can spread contamination; not a substitute for an appropriate neutralizer.

6) Conclusion
Boric acid is the appropriate choice to neutralize spilled Ni‑Cd battery electrolyte; this confirms the provided correct answer: boric acid.

What would you use to neutralize spilled electrolyte from a nicad battery? [nicad batteries]Single choice

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