To analyze the solubility, colour and pH measurement, the powder that was recovered must be added into the
distilled water to dissolve it into a solution with the ratio 18.5g of powder: 50g of water. This ratio was based on the
average production yield which is the feed 137 g, it could produce 37 g of powder. Then, a magnetic bar was
dropped and the beaker was located on the “FISHER” hot plate stirrer model 210T setting at speed 1100 rpm. The
stopwatch was started same as the hot plate stirrer started and stopped when the powder in the beaker entirely
dissolved. The heater must not to turn on.