Chemical equations balancing practice

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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 in the reaction.

Front

How do you determine the coefficient for a compound in a balanced equation?

Back

To determine the coefficient, adjust the numbers in front of the compounds to ensure that the number of atoms for each element is equal on both sides of the equation.

Front

What is the balanced equation for the reaction of sodium and chlorine?

Back

2Na(s) + Cl2(g) → 2NaCl(s)

Front

What is the product of the reaction between sodium bromide and calcium hydroxide?

Back

The products are calcium bromide and sodium hydroxide.

Front

How do you balance the equation Al + HCl → H2 + AlCl3?

Back

The balanced equation is 2Al + 6HCl → 3H2 + 2AlCl3.

Front

What is the significance of the states of matter in a chemical equation?

Back

The states of matter (solid, liquid, gas, aqueous) indicate the physical form of the reactants and products, which can affect the reaction conditions.

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.