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Reaction between cations and anions will be examined in this lab. The resulting precipitate is indicative of the reaction that occured.
In our lab a lead nitrate solution, Pb(NO3)2 will be mixed with a solution of potassium chromate, K2CrO4 , a yellow precipitate will forms. This precipitate must be a combination of K+ or Pb2+ cation and CrO4 2- or NO3 2- anion. Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is:
Pb2+ + CrO4 2- -> PbCrO4
Procedure
In this lab we will do the following:
Step 1. Add 50 ml(s) of Potassium chromate 1M solution in a 100ml beaker
Step 2. Add 50 ml(s) of Lead (II) nitrate 1M into the same 100 beaker
Step 3. Filter the resulting precipitate into a 250ml erlenmeyer flask with a buchner funnel.
Step 4. Record weight of resulting precipitate, by removing buchner funnel and placing resulting precipitate into a test tube.
Observations
Record appearance of precipitate:
Record weight of filtered precipitate:
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I need the following:
– Purpose and Introduction
– Data
– Results
– Analysis and Discussion
– Conclusion
-Observation
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