Chem 18.1 Experiment 5 Fwr

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Experiment 5
COMMON ION EFFECT
MALUBAY, Justin Damian
PADRILLAN, Hazel Rose
CD2, Group 5 Ms. Sarah Sibug
6 April 2013
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I. ABSTRACT
The common ion effect occurs when a given ion is added to an equilibrium mixture that already contains that ion, and the position of equilibrium shifts away from forming more of it. This paper is a follow-up of the experiment which aims to determine the common-ion effect on the extent of ionization of an electrolyte and the solubility of a slightly soluble substance, and to determine the type of substance with comprise buffer solutions and identify buffer solutions. The significance of the study is to know
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The rest of the report is structured as follows: first the methodology or the experimentation at which the collection of data is explained step-by-step. Data results are presented next, followed by the discussion regarding the collected data. Then, the guide questions in the lab manual are answered at the seventh section. Lastly the conclusion and recommendations will sum up the data.

VI. EXPERIMENTATION
The first part of the experiment involves determining the effect on the ionization of acids and bases. In six different test tubes, solutions were prepared respectively. In both test tubes A and B, 10 mL of 0.1M hydrochloric acid was added; and 2 mL of water and 2mL of 0.1M sodium chloride were added, respectively. Acetic acid with concentration of 0.1M and volume 10 mL was added to: test tube C which was mixed with 2mL of water; and D with 2mL 0.1M sodium acetate. Test tube E contained 10mL of 0.1M sodium hydroxide and 2mL of water. And test tube F, also contained 10mL of 0.1M sodium hydroxide, but was added with 2mL of 0.1M sodium chloride instead.

All solutions in the six test tubes were brought to the lab equipment room and were subjected to a pH test, using a pH meter. These data were the analyzed to identify the effect of ionization of acid and bases.

The second part of the experiment was all about buffers. Nine test tube were labeled S for standard and A to H. In test tube S, 10 mL of distilled water was placed. 10mL of

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