Homeostasis Essay

3412 words - 14 pages

INTRODUCTIONIn this experiment our objective is to investigate how chemical properties of different substances react with substances with different chemical properties.In this laboratory experiment we focused on making and recording observations about chemical properties in reactions that give easily describable results such as change in temperature, gas/bubble formation the production of precipitates and also appearance and disappearance of a metal in contact with a solution containing its metal ions. Using the data collected we will attempt to prove the hypothesis that some chemicals can replace another chemical in a compound because it is more active. At the end of this experiment we will be able toe present the chemicals in an order according to their activity.There are many types of reactions that occur in the environment. Oxidation reduction reactions which breaks down into combination reactions, where two or more substances combine to form a single product, decomposition reaction, which is the breakdown of a compound into two or more components and combustion reaction, which is a reaction in which a substance reacts with oxygen.Combination reaction: A + B ABDecomposition reaction: AB A + BCombustion Reaction: C + O2 CO2There are other reactions where a compound is reaplaced by an ion of another element. These are called displacement reactions. Displacement reactions are brokendown into 3 different sub categories.Hydrogen Displacement: Ca + 2H2O Ca(OH)2 + H2Metal Displacement: Zn + 2HCl ZnCl2 + H2Halogen Displacement: Cl2 + 2KBr 2KCl + Br2All the above-mentioned reactions will be tested to prove the hypothesis of activity of metals and to obtain a idea of which metals have a higher activity and which metals have a low activity.MATERIALS24 well platesTest tubeTransfer PipetteBeakersMeasuring Test tubeWooden splint for burn testMetals (Zn, Cu, Fe, Mg, Ag)Nitrate Solutions (AgNO3, Cu(NO3)2, Zn(NO3)2, Mg(NO3)2, Fe(NO3)3, KNO3)Solutions (NaCl, Na2S, NaOH)HCl AcidDistilled WaterCarbonates (Na2CO3, K2CO3, CaCO3, MgCO3)METHODThere were several parts to this laboratory experiment where we combine several chemicals with other chemicals to see the outcome. Firstly we made a table to write down observations that are made.PART 2In this part we tested a group of nitrate solutions with a couple of different solutions. We filed a 24 well plate with 1ml of AgNO3, Cu(NO3)2, Zn(NO3)2, Mg(NO3)2 and Fe(NO3)3 . Each of these nitrates were then mixed with 1ml of NaCl, Na2S, NaOH and Na2CO3 respectively. The solutions were added to each nitrate only after observations were made. Each combination of solutions was carefully observed for any signs of reactions. The observations were then recorded in a table. Extreme care was taken not to let each solution mix with the one next to it as this will create inaccurate and confusing results.PART 3In this part of the experiment we used a correctly labeled 24 well plates with one row with 2ml of HCl and the second row with 2...

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