Week 10- Experiment 9- Properties of Acids and Bases.docx

Observe and note the color d add drops of

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Observe and note the color. d- Add drops of phenolphthalein to the base solution. Note the color. Part 2 : effect of acids on metals a- In 4 test tubes place a few grams of Iron, Zinc, Magnesium, Copper than add 3 to 4 drops of HCL 6M to each test tube to cover the metal. Note the comparative vigor of each reaction. Record the reaction rates in descending order. The reaction is the same in each case where a reaction occurs, differing only in the speed of reaction. The relative reaction rates may be used to compare the activities of the metals. An indication of the relative activities of the metals can be made. b- Repeat the test, using a fairly active metal with acetic acid 6M. Again the reaction differs only in the rate resulting from the difference in the activity (strength) of the acids. Compare the strength of acetic acid with that of hydrochloric acid. Part 3: effect of acids on carbonates Add some grams of CaCO3 and HCL and cover. Place the cap and gas delivery assembly on the cavity. In an adjoining cavity place 5 drop of lime water solution. Place the end of the gas delivery tube in the lime water solution. Note the bubbling, and record the appearance of the limewater. (See figure) This result is typical of the effect of carbon dioxide on lime water. The reaction is typical of the effect of acids on compounds which are carbonates.
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Part 4: titration
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  • Fall '16
  • Wassim Shebaby
  • pH, Sodium hydroxide

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