Balanced and Unbalanced Equations

​​ ​ ​ (a)   KClO₃ ​→ ​ 2KCl ​ ​+ ​ ​ (b)   O₂

• 3

• 6

• 4

• 2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Match the following types of chemical equations to the description that best fits them.

• Shows the formulas of the substances involved AND their relative amounts.

• Skeleton Equation

• Describes the reaction with only words

• Balanced Equation

• Shows only the formulas of the substances involved in the reaction.

• Word Equation

How can someone determine if an equation is balanced?

• The coefficients must be equal on both sides of the equation

• The number of atoms of each element in the reactants must be higher

• The number of atoms of each element must be equal on both sides of the equation

• The number of atoms of each element in the products must be higher

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In this image, the information to the right of the arrow (in black) is called the_______.

• Product

• Reactant

• Chemical Subscript

• Final chemical

Tags

NGSS.MS-PS1-5

Is the following equation balanced or unbalanced ? 
Al + O₂ --> Al₂O₃

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

Identify if the following equation is unbalanced or balanced.

• Unbalanced

• Balanced

Tags

NGSS.MS-PS1-5

Identify if the following equation is unbalanced or balanced.

• Unbalanced

• Balanced

Tags

NGSS.MS-PS1-5

Which of the following equations is balanced?

• @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

• @@ ext{C}_3 ext{H}_8 + 4 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

• @@ ext{C}_3 ext{H}_8 + 6 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

• @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 4 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

Tags

NGSS.MS-PS1-5

What is the first step in balancing a chemical equation?

• Identify the reactants and products

• Count the number of atoms of each element

• Add coefficients to balance the atoms

• Check the charges on each side

In a balanced chemical equation, the mass of the reactants is equal to the mass of the products. This is an example of which law?

• Law of Conservation of Mass

• Law of Definite Proportions

• Law of Multiple Proportions

• Law of Conservation of Energy

Tags

NGSS.MS-PS1-5