Chem_171_Su_08_Q9_Tit_Antacid_Key_Posted-982

Chem_171_Su_08_Q9_Tit_Antacid_Key_Posted-982 - 1. Chem 171...

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Chem 171 Quiz 9 Version A 1. The quantity of Cl in a water supply is determined by titrating the sample with Ag + . Write the relevant net ionic equation. Show states. How many grams of chloride ion are in a sample of water if 20.2 mL of 0.100 M Ag + is needed to react with all the chloride in the sample? Ag = 107.8682. Cl = 35.453 Ag + (aq) + Cl (aq) AgCl(s) Mol Ag + =20.2 mL solution (1L/1000)(0.100 mol Ag + /Lsolution) = 2.02 x 10 -3 mol Ag + Grams Cl = 2.02 x 10 -3 mol Ag + (1 mol Cl /1 mol Ag + )(35.5 g Cl / 1 mol Cl ) = 7.17 x 10 -2 g 2. The following “Fill-in the blanks” pertain to the experiment entitled” Evaluating Commercial Antacids”. a)In a___________________, a known excess of a standard reagent is added to the analyte. Then a second standard reagent is used to titrate the excess of the first reagent b)NaHCO 3 , Al(OH) 3 , and Mg(OH) 2 can all act as _________________ . a)Back-titration
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This note was uploaded on 01/20/2009 for the course CHEM chem 171 taught by Professor Siegal during the Spring '09 term at Rutgers.

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Chem_171_Su_08_Q9_Tit_Antacid_Key_Posted-982 - 1. Chem 171...

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