Intro to Chemistry (Chemical reactions/ formulas)

Intro to Chemistry (Chemical reactions/ formulas)

By rodrigo tavara

Objectives

learn how to balance simple chemical equations ​

Lets start with a demonstration

Why does the candle stop burning after i placed the lid on top?

​

when the candle burns for a while, where does the wax go?​

​

Analyze

Multimedia: Balanced Equation | Chapter 6, Lesson 1 | Middle School Chemistry

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a similar reaction to the candle burning is what happens when you burn methane. note the amount of molecules present.​

on the left side are reactants, on the right are products.​

​

the whole formula

It is important to properly count how many atoms of each element are on each side.

in your journals follow this example.​

​

​how to balance

Multiple Choice

How many atoms of Hydrogen are on the reactants side?

• 1

• 2

• 4

• 1

Multiple Choice

How many atoms of Carbon are on the reactants side?

• 1

• 2

• 4

• 1

Multiple Choice

How many atoms of Hydrogen are on the products side?

• 1

• 2

• 4

• 1

Multiple Choice

How many atoms of Hydrogen are on the reactants side?

• 3

• 1

• 5

• 8

Multiple Choice

How many atoms of Hydrogen are on the products side?

• 3

• 1

• 5

• 8