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10 Cards in this Set
- Front
- Back
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What occurs when hydrogen is added to double bonds (C=C)? |
An alkane is produced. |
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What catalyst is required when adding hydrogen to double bonds (C=C) to produce an alkane? |
A nickel catalyst, 150 C and a high pressure. OR A platinum catalyst at room temperature and pressure. |
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What colour change can be seen when bromine water is added to an alkene? |
The solution goes from orange/brown to colourless. |
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What occurs during the electrophilic addition of alkenes? |
The double bond is opened up and when this occurs with a halogen such as (F, Cl, Br or I) a halogenoalkane is formed. |
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What occurs when alkenes undergo addition reactions with hydrogen halides? |
A halogenoalkane is formed. |
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What can be reacted with an alkene to produce an alcohol? (This is an electrophilic reaction.) |
Concentrated sulfuric acid and cold water. |
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What conditions are needed for ethanol to be manufactured through steam hydration? |
A solid phosphoric (V) acid catalyst at 300 C and a pressure of 60 atm. |
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What is formed when alcohols are dehydrated? |
Alkenes are formed. |
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What conditions are needed to dehydrate alcohols? |
A hot catalyst of pumice stone or aluminium oxide. OR Reflux ethanol with excess concentrated sulfuric acid at 170 C. |
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How can alcohols be oxidised? |
By burning them with a pale blue flame (complete oxidation). OR Using acidified potassium dichromate (VI). |
