According to the law of conservation of matter, we know that the total number of atoms does not change in a chemical reaction and thus mass is conserved. The reactant in this model is hydrogen peroxide. Hydrogen peroxide decomposes to produce water and oxygen gas. How many water molecules must be added to complete this model?
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Answer:
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.
Explanation:
Method Of doing this:-
- Build your reactants. Use marbles and prestik or modelling clay to represent the reactants and put these on one side of your table. Make at least ten (H2) units and at least five (O2) units.
- Place the H2 and O2 units on a table. The table represents the “test tube” where the reaction is going to take place.
- Now count the number of atoms (H and O) you have in your “test tube”. Fill in the reactants column in the table below. to help you fill in the mass row.
- Let the reaction take place. Each person can now take the H and O unit and use them to make water units. Break the H and O units apart and build H2O units with the parts. These are the products. Place the products on the table.
- When the “reaction” has finished (i.e. when all the H and O units have been used) count the number of atoms (H and O) and complete the table.
- What do you notice about the number of atoms for the reactants, compared to the products?
7. Write a balanced equation for this reaction and use your models to build this equation.
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Answer:
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.
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Explanation:
did test
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