Chemistry, 27.09.2019 11:30 Raymond123
1. in this experiment, what property of nacl is used to separate it from the other two components? is this a chemical or physical property? nacl is the only compound in this mixture that is soluble in water, so its solubility in water is the property used to separate it. this is a physical property, because you are doing nothing to change the actual chemical composition. it's just solvated by water. 2. in this experiment, what property of caco3 is used to separate it from sio2? is this a chemical or physical property? the property of caco3 used to seperate it from sio2 is its reactivity with acetic acid. by adding the acetic acid, you develop carbon dioxide (which bubbles out of solution), and cacl2, which is soluble in water. you are undergoing a chemical reaction, so this is a chemical property. 3. an unknown sample of a mixture of salt and sand weighs 7.52 g before washing with water and 3.45 g after. what is the percent of sand in the sample? (show all work.) 7.52g salt and sand, 3.45g sand, 4.07g salt (the difference in before and after water shows how much salt you had) 3.45 g sand / 7.52g total * 100 = 45.9% sand to check that this is correct, find the percentage of salt as well. 4.07g salt / 7.52g * 100 = 54.1% salt 45.9% + 54.1% = 100%. everything is accounted for, so this must be the composition of the mixture.
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1. in this experiment, what property of nacl is used to separate it from the other two components?...
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