This experiment introduces magnetism, evaporation and filtration as ways to separate mixtures.
Temperature when soluble
Experiment and Observation
After gathering all the material needed to conduct these experiments, the first experiment was initiated. The mixture of solids was weighed out as well as the 10cm square piece of paper and the weighing dish. The mixture was spread out in a very thin layer on a piece of paper, the magnet was wrapped with clear plastic and the magnet was passed over the mixture several times to remove the iron from the mixture. The iron was placed on the 10cm square paper and weighed. The next step was to separate out the sand. The sand was placed in the beaker with 50mL of water and heated to close to boiling. The hot liquid was poured into a Styrofoam cup and another 10mL of distilled water was added to the beaker and again it was heated to near boiling and poured into the same Styrofoam cup. The second heating was to ensure all the sodium chloride and benzoic acid was removed from the sand. The Styrofoam cup was placed into an ice bath, the benzoic acid began crystallizing in the ice bath as it started cooling. The sand in the beaker was heated very carefully to allow it to dry. After the sand was dried it was weighed. The benzoic acid and salt were separated. A filter paper was inserted in the funnel and the cup with the salt and benzoic acid was poured into the funnel. A graduated cylinder with 5mL of water was inserted into the ice bath; this was poured into the funnel to eliminate any of the sodium chloride that may have been missed. The filter paper was laid out on several paper towels to dry. After the filter paper has dried it will be weighed and the weight of the filter paper will be subtracted from the total to obtain the exact amount of the benzoic acid. The paper cup of sodium chloride was set aside to allow it to dry. Once it is dry...
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