Chemical Reactions

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or gas production. Example: Burning wood.

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What are products in a chemical reaction?

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Products are the substances that are formed as a result of a chemical reaction, located on the right side of the chemical 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, located on the left side of the chemical equation.

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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 an example of a physical change?

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An example of a physical change is melting ice into water, where the substance changes form but not its chemical composition.

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What is an example of a chemical change?

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An example of a chemical change is rust forming on iron when it reacts with oxygen and moisture.

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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 the arrow in a chemical equation represent?

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The arrow in a chemical equation represents the direction of the reaction, indicating that reactants are transformed into products.

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What is a balanced chemical equation?

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A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, adhering to the law of conservation of mass.

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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 in an equation to indicate how many molecules or moles of that substance are involved.