Vocab
Balancing Equations
Law is Law
True or False
Other
100

What is Mass? 

The amount of matter in an object. 

100

Explain the importance of balancing equations to understand the law of conservation of mass.

Balancing equations show that matter is neither created nor destroyed.

100

According to the Law of Conservation of Mass/Matter, all matter is...

neither created or destroyed 

100

Mass can be created

False, mass is neither created or destroyed

100

What happens to the mass of substances during a chemical reaction? Does it increase, decrease, or stay the same?

Stay the same.

200

What does it mean to Conserve?

To precent the losss of something

200

 How can you tell if a chemical equation is balanced?

The number of atoms for each element on the reactant side must equal the number of atoms on the product side.


200

How does the Law of Conservation of Mass/Matter relate to chemical reactions?

 It ensures that the total mass of reactants is equal to the total mass of products in a chemical reaction.

200

Mass can be destroyed

False, mass can neither be created or destroyed

200

How can you determine if a chemical reaction obeys the Law of Conservation of Mass?

If the reactant atoms are the same number as the Product atoms

300

What is a PRODUCT?

A substance produced during a chemcial reaction

300

CH+ __O2  --> CO2 + __H2O

CH+ 2O2  --> CO2 + 2H2O

300

 What happens to the mass of the reactants compared to the mass of the products in a chemical reaction, according to the Law of Conservation of Mass?

They are the same.

300

The Law of Conservation of Mass can be illustrated using a balanced chemical equation.

True

300

Describe a simple experiment you could conduct to demonstrate the Law of Conservation of Mass.

The baking soda and vinegar experiment where we explored closed and open systems. In the the closed system we place a ballon full of baking soda over a flask of vinegar. In the open system we poured the baking soda in the flask of vinegar without putting the balloon on. 

400

Label the Products and Reactants

2K + 2H2O ---> 2KOH + H2

2K --> Reactant

2H2O --> Reactant

2KOH --> Product

H2 --> Product

400

P4O10 + __H2O --> __H3PO4

P4O10 + 6H2O --> 4H3PO4

400

What must be equal on both sides of a balanced chemical equation, according to the Law of Conservation of Mass?

The number of atoms of each element.

400

The Law of Conservation of Mass applies only to reactions occurring in labs, not those happening in nature.

False

400

Can you think of any exceptions or situations where the Law of Conservation of Mass may not seem to hold true?

No, the Law of Conservation of Mass is a fundamental principle in chemistry and applies universally to chemical reactions.

500

Label the Coefficient and Subscrips in this equation:

2Ca3(PO4)2 + 6SiO2 → P4O10 + 6CaSiO3

*See Teacher Board*

500

__Al + __HCl → __AlCl3 + __H2

2Al + 6HCl → 2AlCl3 + 3H2

500

Is a closed system or open system better for showing the Law of Conservation of Mass?

A closed system

500

 If a reaction produces 100 grams of a product, and the total mass of the reactants was 120 grams, the Law of Conservation of Mass has been violated.

True

500

C3H8 + __O2 --> __CO2 + __H2O

C3H8 + 5O2 --> 3CO2 + 4H2O