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7F Acids and Alkalis
Key words
Term | Definition |
---|---|
Acid | Acid A substance that releases hydrogen ions (H+) |
Base | A substance that releases hydroxide ions (OH-) |
Alkali | A soluble base |
Caution | To be careful |
Diluted | Adding water to make less concentrated |
Toxic | Poisonous |
Irritant | Cause soreness or sting |
Concentrated | A solvent containing a large amount of solute |
Precaution | A procedure to avoid harm |
Indicator | A dye that changes colour at different pH |
Neutral | pH = 7 |
pH | The hydrogen ion concentration (integers represent multiples of 10) |
pH scale | 1 most acidic to 14 most alkali |
Neutralisation | Acid and base reacting to from water and a salt |
Salt | A positive metal ion forming an ionic bond with a negative non-metal ion (or polyatomic ion) |
Antacid | A medicine to neutralize excess stomach acid |