Balancing Equations Worksheet

Front

Balance the equation: __Ca + __O2 → __CaO

Back

2Ca + O₂ → 2CaO

Front

Balance the equation: __ZnS + __O₂→ __ZnO + __SO₂. Options: 2ZnS + 3O₂ → 2ZnO + 2SO₂, ZnS + O₂ → ZnO + SO₂, ZnS + 2O₂ → ZnO + 2SO₂, 2ZnS + 2O₂ → 2ZnO + SO₂.

Back

2ZnS + 3O₂ → 2ZnO + 2SO₂

Front

Why is balancing equations necessary?

Back

Law of Conservation of Mass

Front

What is the difference between Cl₂ and 2Al in terms of subscripts and coefficients?

Back

Cl₂ uses a subscript to show two chlorine atoms in a molecule, while 2Al uses a coefficient to show two separate aluminum atoms.

Front

If an atom gains an electron, it is _____.

Back

a negative ion

Front

If an atom loses an electron, it is _____?

Back

A positive ion

Front

Which type of model is pictured? Options: Bohr model, electron cloud, plum pudding, billiard ball

Back

Bohr model

Front

According to the pH range which substance is more acidic than lemon juice

Back

Hydrochloric acid

Front

What tastes sour?

Back

Acids

Front

The pH scale is a range from:

Back

0-14