A sample of lead nitrate weighing 28 grams is added to a sample of potassium iodide weighing 12 grams. The two substances mix and produce lead iodide and potassium nitrate. If the lead iodide is found to weigh 14 grams how much should the potassium nitrate weigh?

Question

A sample of lead nitrate weighing 28 grams is added to a sample of potassium iodide weighing 12 grams.  The two substances mix and produce lead iodide and potassium nitrate.  If the lead iodide is found to weigh 14 grams how much should the potassium nitrate weigh?

cuanchi · Answer

According to Lavoisier and the Law of Conservation of Mass, in a chemical reaction  the sum of the mass of the reactants has to be equal to the sum of the mass of the products. 

28 g lead nitrate + 12g potassium iodide = 14g lead iodide + "X" g potassium nitrate

Isolate the "X" that is the answer of your problem