Double Placement Reactions Lab

Topics: Ion, Laboratory glassware, Chemistry Pages: 4 (815 words) Published: December 12, 2010
* Reactions Lab
* November 14, 2010

Double Replacement Reaction

Introduction / Purpose:
The purpose of this experiment is to combine a solution made of potassium iodide and a solution of lead (II) nitrate and produce a precipitate. The reaction is listed as Pb(NO3)2(aq)+2KI(aq) 2KNO3(aq)+PbI2(s). The contents of the beaker was the solution of potassium iodide and lead (II) nitrate. The solution was poured into an Erlenmeyer flask holding a Buchner funnel with a piece of filter paper at the bottom of the funnel. The filter paper contained a yellow precipitate at the end of the experiment. This precipitate was lead (II) iodide. The potassium combined with the nitrate and filtered through the paper whereas the lead combined with the iodide and was not soluable in water and was collected on top of the paper.

* 40 ml Potassium Iodide (Kl)
* 20 ml Lead (II) Nitrate (Pb(NO3)2)
* 100 ml Beaker
* Stirring rod
* Erlenmeyer flask
* Buchner funnel
* Watch glass
* Scale

Experimental Methods:
1) Obtain a 100 ml beaker
2) Obtain 40 ml of Potassium Iodide (Kl)
3) Obtain 20 ml of Lead (II) Nitrate (Pb(NO3)2)
4) Obtain an Erlenmeyer flask
5) Obtain a Buchner funnel with filter paper at the end of the funnel 6) Obtain a stirring rod
7) Obtain a watch glass
8) Combine the 40 ml of Potassium Iodide (Kl) and 20 ml of Lead (II) Nitrate (Pb(NO3)2) in the 100 ml beaker 9) Use the stirring rod to stir the solution
10) Place the Buchner funnel in the Erlenmeyer flask
11) Pour the solution from the 100 ml beaker into the Buchner funnel 12) Remove the Buchner funnel from the Erlenmeyer flask
13) Place the solid precipitate from the filter paper into the watch glass 14) Using the scale, record the weight of the solid

Weight of Percipitate| Color of Percipitate| % Yeild|
9.112 g| Yellow| .0098828633|

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