_Expt13 - Determine its pH and calc the[H Likewise det the...

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Date Performed: Experiment 13 pH Determination I. Objectives: >determine whether the solute in solution is an acid or a base. >determine pH of different solutions >observe the effect of dilution in the pH of a solution II. Diagrams/Figures for Special Set-ups: none III Outline/Schematic Diagram of Procedure.: 1. pH Determination 1.1 Using a glass rod, moisten piece of pH paper placed on a watch glass w/ assigned test soln. Different piece of pH paper per soln. 1.2 Record the pH values in your data sheet. Classify the solns as: strong acid, strong base, weak acid, weak base or neutral. From the definition of pH, calculate the hydrogen ion concentration, [H + ], of the solns. 2. pH as a fxn of concentration 2.1 Using a pipette, measure out 1 mL of 0.1 M HCl into a small beaker.
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Unformatted text preview: Determine its pH and calc the [H + ]. Likewise det the pOH and [OH-]. 2.2 Using the same pipette, add 9 mL of dH 2 O to the acid in the beaker, bringer the total volume up to 10 mL (Theoretically, what is the new concentration of HCl?). Stir the mixtrure, determine its pH and calc [H + ]. 2.3 Measure out 1 mL of the HCl solution in 2.2 into a new beaker and add 9 mL dH 2 O into it (What is the new conc of HCl?). Stir the mixture, determine its pH and calc [H + ]. 2.4 Repeat the entire procedure (2.1-2.3) using 0.1 M NaOH instead of HCl. IV. Special Notes: Waste: >flush down sink, dilute 1st V. Tabulation of Data:...
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This note was uploaded on 08/11/2008 for the course CHEM 16 taught by Professor Siao during the Fall '07 term at University of the Philippines Diliman.

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