We pondered the question “How does soap work?” in the Lab. First, we found out about the special properties of soap molecules – one end is attracted to water (hydrophilic), the other end is repelled by water (hydrophobic)! This meant that when we but a few drops of washing up liquid into an oil and water mix, the oil broke up. The next week, we carried out an investigation to see which brand of washing up liquid was the most effective!