Chemistry Lab Physical Separation Lab The purpose of this lab was to try different methods to physically separate various materials. The variables for this lab were the evaporation of the water and/or the loss of sand or salt. My hypothesis for this lab was that the sand could be filtered out of the water and AUTHOR gouverneur Page PAGE 1 DATE 10/12/00 Ring stand – used to hold the wire gauze and the evaporating dish Ring – used to hold the wire gauze in place on the ring stand Wire gauze – used to set the evaporating dish on to be heated Butane burner – used to heat the salt water solution to evaporate the water Evaporating dish – used to evaporate the water from the salt Balance – used to measure the mass of the solutions Safety procedures included safety glasses and aprons. Disposal procedures included returning the sand to a disposal jar and dumping 1. Weighed filter paper and recorded results. 2. Weighed evaporating dish and recorded results.
3. Poured approximately 10 grams of sand on the filter paper and recorded 4. Poured sand into evaporating dish. 5. Weighed another piece of filter paper and recorded results. 6. Poured approximately 10 grams of salt on the filter paper and recorded 8.
Mixed in a small amount of water. 9. Used filter paper and funnel to separate sand from salt and water. 11. Put the separated sand back into the evaporating dish, measured mass, and 11. Mixed in a small amount of water and find the mass. 11.
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Boiled the water until it evaporated completely. 11. Re-weighed the salt in the evaporating dish and recorded results. Table 1: Separation of Salt and Sand Dish MassSalt MassSand MassTotalDry MassSand Left% Error39.1g10.2g10.4g59.7g51.7g10.6g1.9% 10.6 – 10. 4= 0.2 0.2 / 10.4 = 0.0192 0.0192 * 100 = 1.9% Table 2: Separation of Salt and Water Dish MassSalt MassSand MassTotalDry MassSalt Left% Error39.1g10.0gN/A49.1g48.5g9.8g2% 10.0 – 9.8 = 0.2 0.2 / 10.0 = 0.02 0.02* 100 = 2% I observed the salt dissolve in the water when the two were mixed. I also observed how when the mixture was poured through the filter all of the sand remained in the filter paper while the dissolved salt and water went into the beaker. 8.
Most of the salt was separated from the sand. 8. I added some water to the salt and sand m????????????????????????????????????????????????? ?????????????????????????????????????????????????? 8. ????????????????????????????? ? ? ? ? ? 8. ? ? A A 1. A A A A A A ?????????????????????????????????????????2. ?????????????????????????????????????????????????? ?????????????????????????????????????? ?3. ? ?????? ??H?l?? ? ? ? ? ? ????????????? ?? ?4.
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