Balancing and Writing Chemical Equations

Which of the following equations are correctly balanced?

• 12CO₂ +H₂O --> C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O --> C₆H₁₂O₆ + O₂

• CO₂ + H₂O --> 3C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

• 1, 1, 3

• 2, 2, 2

• 1, 2, 1

• 2,1, 2

Tags

NGSS.MS-PS1-5

Balance the following equation:

___ SeCl₆+ ___ O₂→___ SeO_{2+____}Cl₂

• 1, 1, 1, 3

• 2, 1, 2, 1

• 1, 2, 1, 2

• 2, 2, 2, 4

Tags

NGSS.MS-PS1-5

What is the part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

The numbers placed in ​ (a)   of formulas to balance equations are called ​ (b)   , and they multiply all the atoms in a ​ (c)   . Thus, the symbol “2NaHCO₃” indicates ​ (d)   units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms

(2 X 3= 6, the coefficient times the subscript for O).

• front

• coefficients

• two

• formula

When balancing an equation, you can change the ​ (a)   of a substance, but you cannot adjust any ​​ (b)   because that would change the formula.

• coefficient

• subscript

Tags

NGSS.MS-PS1-5

​ ​ Balance the equation. The options can be used more than once.

​ ​ (a)   K   + Cl₂       →     ​ ​ (b)   KCl

• 2

• 3

• 4

• 1

Tags

NGSS.MS-PS1-5

Balance this equation:

​ (a)   FeCl₂ + ​ (b)   Cl₂ --> ​ (c)   FeCl₃

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-5

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

• Describes the reaction with only words

• Balanced Equation

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

• Word Equation

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

• Skeleton Equation

• 3

• 2

Tags

NGSS.MS-PS1-5