Complete and balance the equation for each of the following reactions: b. Zn(s) + HCl(aq) →

Verified step by step guidance

1. Identify the type of reaction: This is a single displacement reaction where zinc (Zn) will displace hydrogen (H) from hydrochloric acid (HCl).
2. Write the unbalanced equation: Zn(s) + HCl(aq) → ZnCl₂(aq) + H₂(g).
3. Balance the equation: Start by balancing the number of chlorine (Cl) atoms. Since there are two Cl atoms in ZnCl₂, you need two HCl molecules.
4. Adjust the coefficients: Place a coefficient of 2 in front of HCl to balance the Cl atoms: Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g).
5. Verify the balance: Check that the number of each type of atom is the same on both sides of the equation. There is 1 Zn, 2 Cl, and 2 H on each side.

Key Concepts

Chemical Reactions

A chemical reaction involves the transformation of reactants into products through the breaking and forming of chemical bonds. In this case, zinc (Zn) reacts with hydrochloric acid (HCl) to produce zinc chloride and hydrogen gas. Understanding the types of reactions, such as single displacement, is crucial for balancing equations.

Balancing Chemical Equations

Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides of the equation, adhering to the law of conservation of mass. This process involves adjusting coefficients in front of compounds to achieve balance, which is essential for accurately representing the reaction.

Stoichiometry

Stoichiometry is the quantitative relationship between reactants and products in a chemical reaction. It allows chemists to calculate the amounts of substances consumed and produced, which is vital for balancing equations and predicting the outcomes of reactions. In the given reaction, stoichiometry helps determine the correct coefficients for Zn and HCl.