A technician finds three bottles of colourless liquids with their labels missing. The technician knows that the bottles contain:
• ethanol
• dilute ethanoic acid
• hexene (an alkene)
Relative atomic masses: C = 12, H = 1, O = 16
Calculate the percentage by mass of carbon in ethanoic acid, CH3COOH\mathrm{CH_{3}COOH}CH3COOH. Use the equation: percentage by mass=total relative atomic mass of the element in the formularelative formula mass×100\displaystyle \text{percentage by mass} = \frac{\text{total relative atomic mass of the element in the formula}}{\text{relative formula mass}} \times 100percentage by mass=relative formula masstotal relative atomic mass of the element in the formula×100
Complete the word equation for the reaction of ethanoic acid with sodium hydroxide.
ethanoic acid + sodium hydroxide →\rightarrow→ .................... + ....................
Devise a plan to identify which bottle contains each liquid. Your plan should include the tests you would do and the results you would expect for each liquid.
43 exam-style questions on Edexcel GCSE Chemistry 10.4 Alcohols and carboxylic acids, covering 10.4.1 Alcohols and the -OH functional group, 10.4.2 Carboxylic acids and the -COOH functional group, 10.4.3 Oxidation of alcohols and homologous series, and 10.4.4 Fermentation and fractional distillation of ethanol. Each one has a worked solution and a mark scheme showing where the marks go.