Wk 14: Balancing Chemical Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

How do you determine if a chemical equation is balanced?

Back

To determine if a chemical equation is balanced, count the number of atoms of each element on both sides of the equation and ensure they are equal.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction and are used to balance the equation.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products until the number of atoms of each element is equal on both sides.

Front

What is the role of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule; they cannot be changed when balancing equations.

Front

What is the difference between a reactant and a product?

Back

Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What does it mean to balance a reaction involving polyatomic ions?

Back

When balancing reactions with polyatomic ions, treat the entire polyatomic ion as a single unit if it appears unchanged on both sides of the equation.

Front

How many atoms of manganese (Mn) are in 3Cr(MnO4)6?

Back

There are 18 manganese (Mn) atoms in 3Cr(MnO4)6.

Front

What is the balanced equation for the reaction of barium sulfide and platinum(II) fluoride?

Back

The balanced equation is 1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS.