Nicotine (c) in a water (a) solution containing 1% nicotine is to be extracted with kerosene (b) at 20°c using co-current contact equipment. water and kerosene are essentially insoluble. i) determine the percentage extraction of nicotine if 100 kg of feed solution is extracted once with 150 kg solvent. [4 marks) ii) determine the percentage extraction of nicotine for three theoretical extractions using 50 kg solvent each.