Separation of a Solution: Dissolved Solid and Water Q uestion –H–H ow can we separate and identify the dissolved solid? M aterials –5–5 0 mL Beaker –C–C eramic crucible –G–G raduated cylinder –b–b alance/scale –S–S oluble solid –h–h ot plate –L–L ab scoop –s–s afety goggles –R–R ubbing alcohol –P–P lastic dish

Procedure and Data – Measure 3 g. of the solid – Measure 20 mL of water – Add both the solid and water to the small beaker and stir over until dissolved. – Pour solution into crucible. Boil off the liquid at a medium- high temp, reserving the solid before it reaches its melting point! – When the solid is recrystallized, scrape it into weighing dish. – Measure mass on digital balance – Record the physical characteristics: Ex. solid, crystalline, metallic, etc – Measure volume by displacement in alcohol. – Calculate density (D=mass/volume) – Conduct a flame test for color when burning.

Data Collection Physical Properties – phase at room temp, color, texture, brittle or ductile MassVolumeDENSITY = mass/volume Flame Test for color

Analysis and Conclusion What evidence do you have that the substance dissolved in water versus reacted with the water? What is the solvent and what is the solute in this investigation? Explain how you separated the dissolved solid from the water. Consult Sludge Matrix. Based on the evidence, can you infer what the dissolved solid is? Make a claim using evidence for support. Use as many pieces of evidence/data from your lab as you can.