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Review%20Questions-Crib - Example 1(11.72 If a solution of...

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Example 1 (11.72) If a solution of AgNO 3 is added to an HCl solution, insoluble AgCl will precipitate: AgNO 3 (aq) + HCl (aq) AgCl (s) + HNO 3 (aq) (a) What volume of 1.20 M AgNO 3 solution must be added to 250.0 mL of a 0.100 M HCl solution to precipitate all the chloride ion? First, find the number of moles of HCl that is reacting: ( 29 HCl mol 0.0250 L 1 mol 0.100 L 0.2500 = Now, find (using the balanced eqn) how many moles of AgNO 3 are needed: ( 29 3 3 AgNO mol 0.0250 HCl mol 1 AgNO mol 1 HCl mol 0.0250 =
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Example 1 (cont’d) Now, determine how many mL of 1.20 M AgNO 3 contain 0.0250 mol AgNO 3 : ( 29 mL 20.8 L 0.0208 AgNO mol 1.20 L 1 AgNO mol 0.0250 3 3 = =
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Example 1 (cont’d) (b) What mass of AgCl should precipitate? First, find the number of moles of AgCl (using the balanced eqn) that are formed from either the HCl or AgNO 3 that reacts (I used HCl): Now, convert the moles of AgCl to mass using the molar mass of AgCl:
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This note was uploaded on 02/27/2012 for the course CHEM 112 taught by Professor Harwood during the Spring '11 term at Purdue.

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Review%20Questions-Crib - Example 1(11.72 If a solution of...

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