Term
| What happens in every chemical reaction? |
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Definition
| a new substance is formed |
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Term
| What things may happen in a chemical reaction? |
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Definition
| a colour change, a gas formed, a solid formed or an energy change |
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Term
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Definition
| substances that change colour to show which things are acids and which are alkalis |
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Term
| What do we use to crush chemicals and plant material? |
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Definition
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Term
| What is Universal Indicator used for? |
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Definition
| to show the pH of substances |
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Term
| What is the pH scale is used to measure? |
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Definition
| how acidic or alkaline a substance is |
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Term
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Definition
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Term
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Definition
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Term
| What is the pH of a neutral substance? |
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Definition
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Term
| When an acid is diluted with water what happens to its pH? |
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Definition
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Term
| What is a neutralisation? |
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Definition
| when an acid and alkali are mixed to make a neutral solution |
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Term
| What do indigestion tablets do? |
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Definition
| neutralise excess stomach acid |
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Term
| What variables can be altered to change the speed of a reaction? |
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Definition
| concentration, temperature or the size of the solid pieces |
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Term
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Definition
| acidic gases from cars, factories etc dissolving in rain clouds |
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Term
| What is the effect of acid rain on plants, animals, stonework & metal structures, |
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Definition
| animals and plants can die, stonework and metal structures can be damaged |
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Term
| How can acid rain be prevented? |
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Definition
| reduce the amount of acidic gases being released into atmosphere e.g. use public transport, cut down on electricity consumption |
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Term
| How can acidified soil or water be treated? |
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Definition
| add lime to neutralise the acid |
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