Acid spills can be neutralized with:

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When cleaning up an acid spill, you want a substance that can neutralize the acid by reacting with the hydrogen ions to form water and a safe byproduct. Baking soda is a mild base, so it fits this role well. Adding a mixture of baking soda and water to the spill allows the base to evenly contact the acid, quickly neutralizing it and producing water, carbon dioxide, and a harmless salt. This makes the area safer to handle and reduces corrosion and irritation.

Vinegar is an acid, so it wouldn’t neutralize the spill and would add more acid. Ammonia solution is a base, but it can release irritating fumes and create additional hazards, so it’s not the preferred choice for spill cleanup. Plain water only dilutes the acid and doesn’t neutralize it, so the acidity can remain an issue.

For safe and effective neutralization, a mixture of baking soda and water is the best option.