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| Pregunta | Respuesta |
| Blue litmus paper | Acid/Base indicator: Turns red in an acid. Turns blue in a base. |
| Red litmus paper | Acid/Base indicator: Turns blue in a base. Stays red in an acid. |
| Phenolphthalein | Acid/Base indicator: Does nothing in an acid. Turns pink/purple in a base. |
| Methyl Orange | Acid/Base indicator: Turns red/coral in an acid. Turns yellow/orange in a base. |
| Neutralisation | Chemical process: This occurs when and acid and a base combine and cancel each other out. Acid + Metal Hydroxide -> Water + Salt of the Acid e.g. Calcium metal + Hydrochloric Acid -> Water + Calcium Chloride |
| Acids + Metal Carbonates | Chemical reaction: Acid + Metal Carbonate -> Water+ Carbon Dioxide (gas) + Salt of the Acid e.g. Sodium Carbonate + Sulfuric acid -> Water + Carbon Dioxide + Sodium Sulfate |
| Carbon Dioxide | Gas: (CO2) Can be identified by channelling it through a tube into limewater, if the water turns milky it's CO2. |
| Acids + Metals | Chemical reaction: Acid + Metal -> Hydrogen Gas + Salt of the Acid e.g. Aluminium + Sulfuric Acid -> Aluminium sulfate + Hydrogen Gas |
| Hydrogen Gas | Gas: (H2) Can be identified if it's bubbles explode with a loud pop when exposed to flame. |
| The pH scale | The pH scale is a scale on which we can easily identify how Acidic or Basic a substance is. - Measured 1-14 - 7 is neutral, <7 is Basic, >7 is Acidic -Usually measured with a universal indicator |
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