for our final we have to figure out six unknowns the possibilties are sodium chlorate, aluminum oxide, sodium bicarbonate, lead 2 nitrate, potassium iodide, potassium chlorate, barium chloride, magnesium sulfate, and sugarbased of that we have to use two different test to prove that it is the chemical we assume it could bethe only things we're allowed to use are a bunsen burner, test tubes, CuSo4, KI, AgNo3, ph paper/scale, and hydrochloric acid so using these items we have to do test to figure out the unknowns i've been researching and i've found some test i could use but i feel that i need more so any help more than welcome
Make a list of all the things the unknown could be, then cross off all the things it cannot beTry to dissolve the unknown in waterIf it does not dissolve, then it is Al2O3, and you should test for that by trying to dissolve it in HClIf it dissolves, cross off aluminum oxideIf it dissolves in water, add potassium iodide solutionIf it forms a precipitate, it is lead nitrateIf it does not form a preciptate but turns brown, it is sodium chlorate or potassium chlorateDepending on the results, confirm or cross off lead nitrate and/or potassium chlorate or sodium chlorateIn case the unknown is water soluble and indicates sodium or potassium chlorate., do a flame test with platinum or nichrome wire in a gas burner flame, using a piece of cobalt glass to view the flameAn intense yellow flame means sodium chlorateA yellow flame that shows a lilac-colored flame with cobalt glass means potassium chlorateTry to dissolve in hydrochloric acidIf it dissolves without other visible reaction, it is aluminum oxideIf it dissolves with fizzing, it it sodium bicarbonateIf neither,cross off sodium bicarbonate and aluminum oxideAdd AgNO3If a precipitate, it could be KI or BaCl2Add CuSO4If a precipitate with a blue supernate, it is BaCl2 and not KIPlacea small amount of the unknown in the bottom of a test tube and heat over a burner flameIf it melts into a disgusting bubbling brown mass, it is sugarIn short, think of a sequence of reactions that give yes/no answers to the questions of is it this or is it not that.
You should always wash and rinse in cold waterAlso let the machine fill up with water before putting in your clothes and soap so the soap will have time to dissolveNot all clothes are well dyedI've found the colors to bleed more easily as things are being made more cheaply overseasYou should do at least two loads or else you'll continue having colors stain your clothesIt won't be cheaper or faster if you ruin all your clothingLess clothing in the machine means better cleaning of stains.
