balancing equations

Front

What is a balanced equation?

Back

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

Front

How do you determine if an equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation. If they are equal, the equation is balanced.

Front

What is the purpose of coefficients in a chemical equation?

Back

Coefficients are used to balance chemical equations by indicating the number of molecules or moles of each reactant and product.

Front

What does the law of conservation of mass state?

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

How many atoms are in the compound C2H8O?

Back

There are 3 different elements (C, H, O) and a total of 12 atoms (2 C, 8 H, 1 O).

Front

What is the coefficient needed to balance the equation PCl5 + _ H2O → _ HCl + H3PO4?

Back

The coefficients needed are 4 for H2O and 5 for HCl.

Front

What is the balanced form of the equation 2Na + 2H2O → 2NaOH + H?

Back

The equation is balanced as written: 2Na + 2H2O → 2NaOH + H.

Front

How many hydrogen atoms are in 3(NH₄)₂CrO₄?

Back

There are 24 hydrogen atoms in 3(NH₄)₂CrO₄.

Front

What is a reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of the equation.

Front

What is a product in a chemical equation?

Back

A product is a substance that is formed as a result of a chemical reaction, found on the right side of the equation.