Audio description for "Comparing Temperature Change from Heat of Solution (KCl vs NaOH)" Fluorescent video. Temperature scale. Sodium Hydroxide and Potassium Chloride in containers. Dated 03-27-2012 Numbers at each end of the temperature scale fluctuate. Liquid with potassium chloride swirls blue. Liquid with sodium hydroxide churns pink. The sodium hydroxide liquid fades and becomes white. The potassium chloride becomes darker blue. The potassium chloride liquid swirls at a slower rate. The sodium hydroxide liquid churns at the same rate. The lowest number on the scale reaches 14 and does not change. Text, 1 minute The highest number on the scale grows from 36 and eventually reaches 47.