Balancing Chemical Equations review

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What is a chemical equation?

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

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What does it mean to balance a chemical equation?

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

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What are reactants in a chemical reaction?

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Reactants are the starting substances that undergo a chemical change in a reaction.

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What are products in a chemical reaction?

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Products are the substances formed as a result of a chemical reaction.

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What is a coefficient in a chemical equation?

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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.

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What is a subscript in a chemical formula?

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A subscript is a small number written to the right of an element symbol that indicates the number of atoms of that element in a molecule.

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How do you determine the number of atoms in a compound?

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To determine the number of atoms in a compound, add the subscripts for each element in the chemical formula.

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What is the law of conservation of mass?

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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.

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What is a phase change in a chemical reaction?

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A phase change is a transition of matter from one state to another, such as solid to liquid or liquid to gas, often observed during a chemical reaction.

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What evidence indicates a chemical reaction has occurred?

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Evidence of a chemical reaction includes color change, temperature change, gas production (bubbles), and the formation of a precipitate.