Chemistry Concepts: Conservation of Mass/Energy

Purely educational. Not as exciting as some demonstrations, but this DOES clearly illustrate the concept of conservation of mass/energy.

When compounds react, no atoms are created or destroyed. This means that the end product must weigh the same as the initial reactants. Here, lead nitrate and potassium iodide are both placed inside of a stoppered flask. They are kept separate as one was placed inside of a test tube. When the flask is inverted, a double replacement reaction takes place.

Since the stopper prevents anything from escaping, the end mass is still the same. This is the reason that chemical equations need to be balanced. There are no new atoms being formed. The yellow product is insoluble lead iodide.

http://www.monkeyvsgravity.com

Music: Kevin MacLeod

Category:

Education

Tags:

• Science
• Chemistry
• Conservation of Mass
• Educational
• Education
• Demonstration
• Experiment
• Lead
• Potassium
• precipitate
• double replacement
• double displacement

[GigaAndy]

Dunno what the end of the description is going on about, in any reaction mass/energy is conserved.

[ThirstForScience]

Exactly, mass/energy is the problem.

I added that quickly when someone else made a comment about converting mass to energy.

I didn't talk about mass energy equivalence at all, BUT it would probably be better to just add "mass/energy" to the description instead of that weird sentence at the end.

Thanks!

[TIMTEB0WFAN]

thank you very much for that simple explanation lol i h8 chemistry class so much my teacher is the most retarded unorganized bitch ever

[TheDuctDude]

HI MISS HICKS, tis holden here

[Beffeux]

John d'oeuf

[wanintenucks]

@peaceloveunderstable lead nitrate and potassium iodide i think.

[peaceloveunderstable]

what are the two chemicals???????????????????

[Draxis32]

This reaction is quite poisonous, watch out.

But the Conservation of Mass/Energy may aply to regular chemistry, but when it comes to phisics we all know that this law doesn't exist, even if you consider everything there is always a mininum loss that we have no clue where that energy went.

[LydRah2008]

Whoa! It turned yellow!

[kano1957]

Somewone slept at the physics lesson. The mass loss is eqvivalent to energy released by E=mc2

[FalconKingReturns]

hehehehe paul likes sasuages. jk no he's cool