Balance the following equations: d. AlCl3(𝑠)+Ca3N2(𝑠)⟶AlN(𝑠)+CaCl2(𝑠)

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Identify the number of each type of atom on both sides of the equation. For the reactants: AlCl_3 has 1 Al and 3 Cl, and Ca_3N_2 has 3 Ca and 2 N. For the products: AlN has 1 Al and 1 N, and CaCl_2 has 1 Ca and 2 Cl.

Start by balancing the metals. Balance the aluminum (Al) atoms first. Since there is 1 Al in AlCl_3 and 1 Al in AlN, they are already balanced.

Next, balance the calcium (Ca) atoms. There are 3 Ca atoms in Ca_3N_2, so you need 3 CaCl_2 to balance the Ca atoms on the product side.

Now, balance the nitrogen (N) atoms. There are 2 N atoms in Ca_3N_2, so you need 2 AlN to balance the N atoms on the product side.

Finally, balance the chlorine (Cl) atoms. You have 3 AlCl_3 providing 9 Cl atoms, and you need 3 CaCl_2 to provide 6 Cl atoms. Adjust the coefficients to ensure all atoms are balanced.

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주요 개념

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Balancing Chemical Equations

Balancing chemical equations involves ensuring that the number of atoms for 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

The reaction in the question is a double displacement reaction, where two compounds exchange ions to form new compounds. In this case, aluminum chloride reacts with calcium nitride to produce aluminum nitride and calcium chloride. Understanding the type of reaction helps predict the products and the balancing process.

State Symbols in Chemical Equations

State symbols indicate the physical state of the reactants and products in a chemical equation. Common symbols include (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous solutions. These symbols provide important information about the conditions of the reaction and can influence the balancing process.