Balance the following equations. (a) Mg + HNO₃ → H₂ + Mg(NO₃)₂

검증된 단계별 안내

Identify the number of each type of atom on both sides of the equation: Mg, H, N, and O.

Start by balancing the metals: Ensure there is one Mg atom on both sides of the equation.

Balance the hydrogen atoms: There are 2 H atoms in H2, so ensure the same number of H atoms on the reactant side by adjusting the coefficient of HNO3.

Balance the nitrogen atoms: Adjust the coefficient of HNO3 to ensure the same number of N atoms on both sides.

Balance the oxygen atoms: Adjust the coefficients to ensure the same number of O atoms on both sides, considering the NO3 groups.

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주요 개념

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Balancing Chemical Equations

Balancing chemical equations involves ensuring that the number of atoms of each element is the same on both sides of the equation. This is based on the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. Coefficients are used to adjust the quantities of reactants and products to achieve balance.

Types of Chemical Reactions

Understanding the types of chemical reactions, such as single displacement, double displacement, synthesis, and decomposition, is crucial for balancing equations. In the given equation, magnesium (Mg) displaces hydrogen from nitric acid (HNO3), indicating a single displacement reaction. Recognizing the type helps predict the products and their stoichiometry.

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions based on their molar ratios. It allows chemists to determine how much of each substance is needed or produced in a reaction. In balancing equations, stoichiometric coefficients are adjusted to reflect the correct proportions of reactants and products, ensuring the equation adheres to the conservation of mass.

Balance the following equations. (a) Mg + HNO3 → H2 + Mg(NO3)2