Questions about Chemistry Homework- Conservation of Mass?

Posted on 2014-04-16 09:51:00 in Chemistry by JESSICA

Okay so I know that the law of conservation of mass is a law that implies that mass cannot be created or destroyed.



Here are the questions I'm a bit confused on though:



The illustration shows the mixing of two colorless aqueous solutions (lead nitrate and potassium iodide) in a sealed flask to form a yellow precipitate (lead iodide) and a colorless solution (potassium nitrate).

• How would you prove that mass is conserved in this reaction?

• The equation that represents this reaction is Pb(NO3)2(aq) + 2 KI(aq)? PbI2(s) + 2 KNO3(aq). In what ways does this equation show conservation of mass?



So how do you prove that the mass is conserved in this equation? Because the amount of mass in the product is equal to the amount of mass in the reactants?



Please explain it to me, I'm really confused. Thank you!

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