To see a chemical at a microscopic level you would need to use a microscope versus the macroscopic level in which you can see with the naked eye. In the chemical equation (NH4)2Cr2O7(s) ——> Cr2O3(s) + N2(g) + 4H2O(g) you will be able to witness it at a macroscopic level. In the chemical equation of ZnCl2(aq) + Na2S(aq) ——> ZnS(s) + 2NaCl(aq) you will be able to witness the solid at a macroscopic level and after separating the sodium chloride from the water you will also be able to see it at a microscopic level. In this chemical equation Pb(NO3)2(aq) + 2 KI(aq) ——> PbI2(s) + 2KNO3(aq) you will be able to witness the solid at a macroscopic level and after separating the potassium nitrate from the water you will also be able to see it at a microscopic level.
The reactant of the demo experiment is (NH4)2Cr2O7 in which it has a molar mass of 252.06 g/mol. The products of the demo experiment are Cr2O3 that has a molar mas of 151.99 g/mol, N2 that has a molar mass of 28.01 g/mol and 4H2O that has a molar mass of 72.08 g/mol.In the experiment the reactants are ZnCl2 that has a molar m...
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... were of a solid and aqueous solution. For the alternate experiment, the chemical properties were aqueous while the chemical reactions were of a solid and an aqueous solution. Another type of chemical combination that could make a similar reaction like the first experiment is the alternative experiment. While the alternative experiment had other chemical combinations it will still create a similar reaction like the original experiment. The demo experiment was a good example of the law of mass conservation. The reason why is because while doing the experiment the chemical reaction caused the (NH4)2Cr2O7 to release a solid (Cr2O3), nitrogen gas and water in gas form. In which it proves that chemicals can not be created or destroyed just changed. A way in which it could be improved would be to find a way to measure the gas that is being released because of the reaction.
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