| Are atoms Created in a Chemical Reaction? Destroyed?
What does this mean in terms of a Reaction? | -No. Atoms are not Destroyed nor Created in a Chemical Reaction
-This means the Number of Atoms in the Reactants side, is the Same as the Product side
-And this means the Mass is not Lost or Gained. The mass is Conserved |
| How can you prove the Conservation of Mass? use 2Li + F2 -> 2LiF as an Example | -First find the Total of the Relative Formula Mass of the Reactants
2Li= 2 x 6.9= 13.8. F2 = 2x19=38. 38+13.8=51.8
-Then find the Total of the Relative Formula Mass of the Product
2liF= [13.8x2]+[19x2] = 51.8
-Answers are the same, no Mass is Lost or Gained |
| What happens if the mass does Increase in a Unsealed Chemical Vessel? | -If the Mass increases, the most likely reason is that one of the Reactants is a Gas, that's in the Air. The products also probably Aqueous, Solid or Liquid
-Before the Reaction take place, the Gas is floating in the Air. Even though its there, its not being noted in the Reaction Vessel, so you don't know the Mass
-When the Gas reacts, it becomes in the Product, therefore being in the Reaction Vessel. This increases the Total Mass of the Reaction Vessel
-An example can be if a Metal reacts with Oxygen, in a Unsealed Container. The mass in the Container Increases, because the Metal Oxide is the equal mass of the Metal and the Oxygen in the air |
| What happens if the mass does Decrease in a Unsealed Chemical Vessel? | -If the mass Decreases ,it might be because some/all the Reactants are Solids, Liquids or Aqueous, and that one of the Products is a Gas
-Before the Reaction, your Products are Contained in the Reaction Vessel
-If the Vessel is Open to Escape, the Gas can follow suit when its been Formed. Since its not in the Reaction Vessel, its Mass can't be taken in
-So the Total Mass of the Reaction Vessel decreases
-An example can be a Metal Carbonate decomposing to make a Metal Oxide, and Carbon Dioxide
-If its not Sealed, the Carbon Dioxide can go away, making the Mass look Less |
