Mon Prof Augmenté
Acid Meets Base
When an acid and a base mix, their reactive parts cancel each other out. What is left behind is a salt dissolved in water, with a pH close to 7.
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In the picture
- Badge 1 sits on the glass barrel of the burette, which holds the acid being added drop by drop.
- Badge 2 sits on the conical flask of pink liquid, the base waiting to react.
- Badge 3 sits on the pH meter screen, reading 7.0 at the moment the two exactly cancel.
- Badge 4 sits on the watch glass of white crystals, the salt and water left after the reaction.
Examples
- An antacid tablet neutralising stomach acid
- Baking soda sprinkled over spilled vinegar
Key takeaways
- Acid + base → salt + water
- At the neutral point the pH is about 7 and the indicator loses its colour
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