Law of Conservation of Mass

​This law states that

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​Mass is neither created nor destroyed during a chemical reaction.

​Mass is conserved

​The mass of your reactants will be equal to the mass of your products.

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​Mass_reactants = Mass_products

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Mass_reactant + Mass_reactant = Mass_products

• When you bake you are doing a chemical reaction

• The chemical reaction just changes the ingredients into something else as it interacts with other ingredients.

• It's easier to observe the law of conservation of matter in a closed system than an open system

• ​Open System

  • ​matter and energy goes in and out of the system freely

• ​Closed System

  • ​no matter nor energy goes in and out of the system

• It's easier to observe the law of conservation of matter in a closed system than an open system

• ​Open System

  • ​matter and energy goes in and out of the system freely

• ​Closed System

  • ​no matter goes in and out of the system

  • ​energy may go in and out though

• When a system is isolated, no matter nor energy can go in or out.

​I have 10 g of hydrogen (H) and I reacted it with oxygen. If my product's mass is 15 g, how much oxygen did I use?

I reacted aluminum with liquid bromine. I used 10.3 g of aluminum and 100.0 g of liquid bromine. What would be the mass of my product?

• ​Your table will be your group.

• ​You will be provided your materials on your table

• ​You will stay on your tables for the duration of the lab

• ​Work on the lab report when you are done with the lab.