Balancing Equations

Front

What is the balanced equation for the reaction of CF4 and Br2?

Back

1 CF4 + 2 Br2 → 1 CBr4 + 2 F2

Front

How many moles of H2O are needed to balance the equation PCl5 + ___ H2O → ___ HCl + H3PO4?

Back

4 moles of H2O

Front

What does the symbol (aq) represent in a chemical equation?

Back

(aq) indicates that a substance is dissolved in water, forming an aqueous solution.

Front

What is the product side of a chemical equation?

Back

The product side is the right side of the equation, which comes after the yields sign.

Front

What is the reactant side of a chemical equation?

Back

The reactant side is the left side of the equation, which comes before the yields sign.

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the number of atoms of each element is the same on both sides of the equation, adhering to the law of conservation of mass.

Front

What is a coefficient in a chemical equation?

Back

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

Front

What does it mean if a chemical equation is unbalanced?

Back

It means that the number of atoms of at least one element is not the same on both sides of the equation.

Front

What is the significance of the yields sign (→) in a chemical equation?

Back

The yields sign indicates the direction of the reaction, showing that reactants are transformed into products.

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element in the reactants and products.