Balancing Equations

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Which side of a chemical equation is the product side?

• Left (before the arrow)
• Right (after the arrow)

Which side of a chemical equation is the reactant side?

• Left (before the arrow)
• Right (after the arrow)

What does it mean for a chemical equation to be balanced?

• There is the same charge on both sides of the equation.

• There is the same number of each element on both sides of the equation.

• There is the same compounds on both sides of the equation.

Tags

NGSS.MS-PS1-5

When balancing an equation, what is the only thing you can change?

• The subscripts

• The charges

• The coefficients

• The elements

Which equation is balanced?

• 2Na + 2H₂O --> 2NaOH + H₂

• SO₂ + H₂O --> H₂SO₄

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

Tags

NGSS.MS-PS1-5

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.MS-PS1-5