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16 Cards in this Set
- Front
- Back
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What is electrolysis? |
Electrolysis is used to seperate compounds using electricity. |
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Is electrolysis cheap or dear and why? |
Electrolysis is dear because it uses alot of energy. |
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What is it above in the reactivity season that you can use electrolyis? |
It has to be above carbon for you to use electolysis. |
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What can you see/observe when you mix calcium and water together? |
It fizzes and goes cloudy.But also it gets warmer and lets off a gas. |
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How do you test for it? |
You can do an experiment were you put electroids in a copper suphate soloution and that should then react and give a copper coating on one of the electroids. |
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What is displacement? |
Displacement is were you can have a reaction e.g. copper chloride+magnesium ans the magnesium is higher than copper in the reactivity series so it will take its place and you will end up with magnesium chloride +copper. |
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What happens hen you increase the temperature on gases? |
they will start moving around more. |
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What is a physical change? |
when you can change it back to what it used to be e.g. water freezing you can change it back to water |
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What is a chemical change? |
It is were you cant change something back once it has changed e.g. Frying an egg you cant change it back to an egg once it has fried. |
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What is another name for rusting? |
Corroding. |
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What can make a nail rust? |
Oxygen or Water |
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How can you prevent rusting/corroding? |
You can prevent it by painting it or putting oil on it. |
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What are 3 types of chemical reactions? |
1.burning 2.rusting 3.cooking |
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Name 3 things you look for in a chemical reaction. |
1.change in colour 2.giving off gas 3.change of temperature |
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What does biodegradeable mean? |
A substance that is capable of being decomposed. |
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What is at the top of the reactivity series? |
Pottasium |
