Criado por Samina Rashid
quase 11 anos atrás
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Questão | Responda |
Draw methane | CH4 |
Draw ethane | C2H6 |
Draw methanol and ethanol | CH3OH CH3CH2OH |
Draw ethanoic acid | CH3COOH |
Draw an ester | CH3COOCH2CH3 |
write a balanced symbol equation for: methane + oxygen = carbon dioxide + water | CH4 +2O2 = CO2 +H2O |
why are alkanes not reactive? | because the C-H bond is very stable and does not break easily |
why are alkanes called saturated hydrocarbons? | because they don't have any C=C double bonds |
write the word equation for the fermentation of glucose | glucose = ethanol + carbon dioxide |
name 2 carboxylic acids and their uses | ethanoic acid = vinegar citric acid = lemon juice |
why are carboxylic acids known as weak acids | because they have a PH between 3-6 |
Draw propane | CH3CH2CH3 |
Draw butane | CH2CH2CH2CH3 |
Give 2 uses of methanol and 2 uses of ethanol | methanol: as a fuel, antifreeze, industrial feedstock ethanol: wines/spirits, and as a solvent and a fuel |
draw ethanol and methanol | CH3CH2OH CH3OH |
compare the boiling points, solubility and structures of alcohols and alkanes | Draw structures and compare (OH in alcohols). alcohols mix with water easily, alkanes don't - they form a layer on top. Boiling points of alcohols higher because they form stronger intermolecular forces |
write a word equation for ethanol and sodium. What would you see happening if you did this in the lab? | http://www.youtube.com/watch?v=aGaWwnMyKVE |
What are the differences in the reactions of sodium with A) an alcohol B) an alkane and C) with water. | Alcohols react and give off hydrogen gas. Water also reacts but the reaction is more vigorous and alkanes don't react. |
what 2 main igredients do you need to make an ester? | carboxylic acid and alcohol |
write a word equation for the formation of an ester | carboxyllic + alcohol = ester + water |
give 2 uses of esters | perfumes and flavourings |
explain the laboratory procedure for making an ester | http://www.youtube.com/watch?v=7fgZDm7d8Xk |
understand that fats are esters of glycerol and fatty acids | Natural fats and oils are esters. from glycerol and fatty acids. You should be able to draw them. |
what is the difference between saturated and unsaturated fats? | Saturated fats do not have C=C |
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