Zadanie 1b
Draw a Lewis (electron dot) formula for a molecule of ethanoic acid, showing every bonding and non-bonding electron pair.
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Draw a Lewis (electron dot) formula for a molecule of ethanoic acid, showing every bonding and non-bonding electron pair.
Calculate the percentage by mass of carbon in ethanoic acid.
Ethanoic acid and propanone, CH3COCH3, each contain a C=O group, and their molar masses are close. (i) Considering the strongest intermolecular forces in each liquid, explain why propanone boils at a much lower temperature than ethanoic acid.…
Heat treatment at 90 °C is used to destroy spoilage micro-organisms in pineapple juice. The concentration of vitamin C was measured over 56 days in untreated juice and in heat-treated juice from the same batch. (i) Identify the dependent variable in this…
Ultraviolet (UV) light is being investigated as a way of killing micro-organisms in juice without heating it, so that less vitamin C is lost. The absorption spectrum of a dilute aqueous solution of sorbic acid, a preservative that is added to some bottled…
The concentration of vitamin C and the pH of five fruit juices were measured. Use the data to deduce whether pH and the concentration of vitamin C are correlated, giving a reason.
The vitamin C content of a juice can be found by titrating a sample against a standard iodine solution. Starch is used as the indicator: it forms a dark blue-black complex with the first excess of iodine once all the vitamin C has reacted.…
A hydrocarbon burns completely in excess oxygen. The amounts of carbon dioxide and water formed are in the mole ratio 3 : 2. Which hydrocarbon is it? A. C2H6 B. C3H6 C. C3H4 D. C4H10
Outline the meaning of the term “homologous series”, with reference to the carboxylic acids.
Draw a Lewis (electron dot) structure of ethanoic acid, CH3COOH.