These calculations and answers are shown in the table below. 0 hours 24 hours 48 hours 72 hours 5°C 6.5 - 6.4 = 0.1 6.4 - 6.4 = 0 6.4 - 6.0 = 0.4 20°C 6.5 - 6.1 = 0.4 6.1 - 5.5 = 0.6 5.5 - 4.8 ...