Easily Beat GED Science Balancing Chemical Equations Questions

Описание: Learn how to balance chemical equations for a higher score on GED science!

What's in this video:
00:00 Intro
00:14 What are coefficients?
00:53 What are subscripts?
1:11 Reactants vs products
1:43 Reading chemical equations
2:21 Practice questions
5:18 What’s the Law of Conservation of Mass?
5:54 Determining if a chemical equation is balanced
9:45 Tips for balancing chemical equations
10:06 Examples/practice questions on balancing chemical equations

-Quick notes from the video:

We use chemical equations to represent chemical reactions.

The numbers in front are called coefficients.

You can change the coefficients while balancing.

If no coefficient is written, the coefficient is one.

The numbers after the chemical symbols are called subscripts.

You CAN’T change subscripts while balancing.

Substances on the left-hand side of the arrow in a chemical equation are called reactants. Substances on the right-hand side of the arrow are called products. The arrow means "reacts to yield."

What’s the Law of Conservation of Mass?
-Matter is neither created nor destroyed in a chemical reaction--only transformed. Therefore, the mass of the products must always equal the mass of the reactants
-Each element has its own mass.
-Accordingly, there must be an equal number of atoms of an element on both sides of an equation.

3 tips for balancing chemical equations:
1.Try to balance the most complicated formula first
2. Try to balance the least complicated formula last (H2,etc.)
3. Continually assess the # of atoms on each side as needed

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