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Acid-base neutralization reactionBaking soda (sodium bicarbonate) is alkaline, capable of breaking down grease and softening grime; vinegar (acetic acid) is acidic, dissolving mineral deposits and soap scum.When mixed, they produce carbon dioxide bubbles, creating tiny impacts that loosen stubborn blockages in the pipes.Natural, environmentally friendly, safe, and non-toxicCommercially available chemical cleaners often contain corrosive ingredients that may damage pipes and harm health; baking soda and vinegar are environmentally friendly and harmless even to the skin.Baking soda's fine particles gently rub away grime; the acidity of vinegar kills some mold and bacteria, reducing odor sources.II. Complete Step-by-Step Instructions: Follow along, and you're done in 10 minutes!50g baking soda (about 4 tablespoons)100ml distilled white vinegar (or regular vinegar if unavailable)1 kettle of boiling water (about 500ml)Measuring cup, container, rubber gloves (optional)Note: If the drain is completely still, you may need to gently press down with a rubber plunger to partially unclog it.Slowly pour a small amount of hot water (do not boil) down the drain to soften any remaining grease in the pipes.Key Tip: The hot water temperature should not be too high to avoid deforming the PVC pipes.Pour 50g of baking soda directly into the drain hole and let it sit for 5 minutes to allow the powder to absorb the grease.Step 4: Add Vinegar, Start the ReactionSlowly pour the vinegar down the drain. Foaming and a hissing sound will immediately appear (this is a normal reaction).Tip: You can temporarily cover the drain hole with a damp cloth to allow the air bubbles to work effectively in the pipes, enhancing cleaning power.Wait 1-2 hours to allow the acid-base reaction to completely break down the dirt.