Balancing Chemical Equations - Part 3

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that matter cannot be created nor destroyed in a chemical reaction.

Front

How do you determine if a chemical equation is balanced?

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means adjusting the coefficients in front of the reactants and products to ensure that the same number of each type of atom appears on both sides.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved.

Front

Balance the equation: _Mg + _Cl2 --> _MgCl2

Back

The equation is already balanced.

Front

How many atoms of oxygen are in the equation: 4Al + 3O2 --> 2Al2O3?

Back

There are 6 atoms of oxygen on the left side.

Front

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

Back

No, the equation is not balanced.

Front

Balance the equation: __P4 + __O2 --> __P2O3

Back

1, 3, 2

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to obey the law of conservation of mass and accurately represent the quantities of reactants and products.

Front

What happens if a chemical equation is not balanced?

Back

If a chemical equation is not balanced, it does not accurately reflect the conservation of mass, leading to incorrect stoichiometric calculations.