Ultrasonic humidifiers are the quietest humidifiers available, and the ideal choice when noise level is a concern (if you are a light sleeper). In general, a warm moisture humidifier will be much quieter than a cool moisture evaporative humidifier.
Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at a standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811.
In this experiment, we will study how pH and temperature affect the. ability of amylase to hydrolyze starch. We will detect the presence of starch in solution using iodine solution as an indicator. Iodine (I2) is a deep blue/black in the presence of starch.