The document discusses the properties of water including: - The normal boiling point of water is 100°C and freezing point is 0°C. - Soft water contains lower concentrations of minerals like calcium and magnesium and forms lather easily with soap. Hard water contains more dissolved minerals and does not form lather well. - Hard water is difficult to use for washing as it does not lather well with soap and can waste soap, form scum, and block pipes over time due to mineral deposits.