Finding products and balancing equations?
For example, Pb(NO3)2 + Kr2CrO4 ----> ?
What would be the product and how do you do it?
Answer:
Bunny, the answer you seek is not simple, but I will try.
As a rule of thumb, all nitrate salts are soluble, and potassium chromate is soluble too, that helps to understand the reaction. You kind of guess that the end product is potassium nitrate (a soluble salt) and some lead chromate compound (which is probably insoluble).
Lead is easily oxidized and reduced to different oxidation states and K2CrO4 is a strong oxidizing agent. With the limited information you have provided, it may not be possible to determine the reactants since another kind of reaction other than a simple exchange might taking place.
From experience, I know that no additional reaction will take place and that only a simple exchange of ions takes place, so the end product is lead chromate (PbCrO4) as well as potassium nitrate (KNO3).
As rule of thumb you can guess a simple exchange of ions, but this is only a first approximation.
First of all Kr does not form Chromate compounds, K does
Pb(NO3)2 + K2CrO4 ----> 2K(NO3) + Pb2+ + CrO4[2-]
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