Read the following statement and answer the following a) what type of reaction is it b) the chemical reaction 1. Put some sulfur on a watch glass. Write down its characteristics. In a test tube, place water up to a third of its volume, add a little sulfur, shake and observe. 2. Prepare the following mixture (sand, sodium chloride, and naphthalene) and then separate according to the properties of the investigated substances. 3. Prepare the following mixture (iodine, sodium chloride, and carbon) and then separate its components according to the investigated properties. Subsequently, identify each member of the mixture separately according to the following techniques:

a) To identify iodine: Place the crystals in a beaker and add 1 mL of potassium hydroxide, obtaining the respective iodide. To identify this iodide in a test tube, add a few drops of lead acetate, forming a yellow precipitate of iodine acetate. b) To identify the sodium ion from sodium chloride: Dissolve the sodium chloride in the least amount of water possible by mixing with a glass shaker and do a flame test where as a result an intense yellow flame will be observed, which which indicates the presence of sodium. c) To identify the chloride ion of sodium chloride: Add a few drops of silver nitrate to the above solution to form a white precipitate called silver chloride.