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31 Cards in this Set
- Front
- Back
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How do you test for carbon dioxide? |
Blow into a test tube full of lime water and if the water goes cloudy there is carbon dioxide present |
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How do you test for oxygen? |
Light a splint and let it burn till it glows and if it relights there is oxygen present |
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How do you test for hydrogen? |
Get a test tube with sulphuric acid and magnesium in it then put your thumb over the testube and put a lit splint into it. If there's a squeaky pop hydrogen is present. |
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Does heat energy get taken out or taken in when there's an exothermic reaction? |
Given out |
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When heat energy is taken in what is it called? |
An endothermic reaction |
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What are the four ways of making salt? |
Acid+alkali=salt+water Acid+metal oxide=salt+water Acid+metal=salt+hydrogen Acid+carbonate=salt+carbon dioxide+water |
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On the PH scale the what are the numbers from 8-14? |
Alkalis |
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Name 2 exothermic reactions |
Combustion and respiration |
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Name 2 endothermic reactions |
Photosynthesis and sherbet |
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What is a chemical bond? |
A force that holds atoms together |
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What is the general word equation for decomposition |
Metal carbonate=metal oxide+carbon dioxide |
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What is oxidation? |
The gain of oxygen by a substance |
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Name an oxidation reaction |
Rusting |
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What is precipitation? |
The creation of a solid in a solution during a chemical reaction |
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What is a compound? |
2 or more different elements chemically bonded |
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What is a molecule |
2 or more atoms bonded together |
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What is a force? |
Something that holds 2 or more atoms together |
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What is a compound with "OH" at the end of it? |
An alkali |
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What is a compound with "H" at the end of it? |
An acid |
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If there are three or more elements one of them being oxygen what does the compound end in? |
"Ate" |
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If there is two or more elements what does the compound end in? |
"Ide" |
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What is AlO |
Aluminium oxide |
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What would NaCl be |
Sodium chloride |
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What would NaCl be |
Sodium chloride |
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What is Mg02? |
Magnesium oxide |
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What type of reaction is calcium carbonate=calcium oxide+carbon dioxide |
Thermal decomposition |
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If there are more bonds made than broken in a reaction what is it called? |
Exothermic |
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If there are more bonds broken than made what is it called |
Endothermic |
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Heat Metal carbonate====metal oxide+carbon dioxide |
. |
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What is the thermal de composition of copper carbonate? |
HeatCopper carbonate====copper oxide+carbon dioxide |
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What is it called when you put and equal amount of an acid and a base together? |
Neutralisation |
