of pure xtures, Activity No. 1.2 Consider activity guides no. 1 and 2. Study first the given table and scenario. Table 1: Boiling point of two liquid samples Temperature in "C SAMPLES Before After 5 lieating minutes After 8 minutes After 10 minutes After 12 minutes After 14 minutes After 16 minutes 28 40 65 - 90 100 100 100 Liquid A Liquid B 30 45 65 97 105 108 113 Scenario 1: Melting point of two solid samples Chef Matt and his assistant observed two solid samples: Solid A and Solid B. Both substances are white crystalline powder. They cannot determine which is a substance and mixture just by looking at it. So, to distinguish which is which, they heated the two samples using an improvised melting dish. Both the two samples were heated at the same time and received an equal amount of heat. After a few minutes, they had observed that Solid A melts completely within a short period of time; while Solid B has portions that seem to be not melting. To find out if you have understood the important concepts of the lesson, answer the following questions below. 1. Which liquid sample is a pure substance? Table 1: Boiling point of two liquid samples Observation while heating Samples Temperature Liquid A Liquid B 2. Which solid sample is a pure substance? Scenario 1: Melting point of two solid samples Samples Appearance Observation while melting Solid A Solid B During boiling, the temperature of a substance changes at the start then it becomes the same and constant. During melting, a substance melts completely smoothly within a short time.​