Reaction Types and Balancing Chemical Equations Review

During a chemical reaction, atoms ________.

• can appear

• can disappear

• get rearranged

• stop moving and vibrating

Tags

NGSS.MS-PS1-5

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

What are Chemical Reactions?

• It's when you mix substances.

• a process in which atoms rearrange to form new substances

• When something bubbles.

• letter and numbers showing the types and number of atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation: H₂ + Cl₂ ---> HCl

• It is balanced.

• H₂ + Cl₂ ---> 2HCl

• 3H₂ + Cl₂ ---> 6HCl

• H₂ + 3Cl₂ ---> 6HCl

Tags

NGSS.MS-PS1-5

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical equation

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

What is the little number after an element in a chemical equation called?

• Coefficient

• Atom

• Subscript

• Equation

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

• YES

• NO

Tags

NGSS.MS-PS1-5

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

Which of the following equations are correctly balanced?

• 12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

• CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

Tags

NGSS.MS-PS1-5