**Concord High School Chemistry**

**Balancing Equations Online Help**

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**Practice Problems Here:**

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**Practice Problem #1:**

Mn + AgCl –>

**Answer to Practice Problem #1:**

**1.** **Identify the type of reaction.**

Single-replacement reaction.

Mn^{2+} is a cation, so it will switch with Ag^{+} (also a cation).

Mn + AgCl –>

**2.** **Write out the products of the chemical reaction.**

Switch the **cations**, since this is single-replacement:

Mn + AgCl –> Ag + Mn Cl

Then write the formulas of the products based on their charges.

Ag is a neutral metal, so the formula is still Ag.

Mn = +2, Cl = -1, so the formula is MnCl_{2}.

Mn + AgCl –> Ag + MnCl_{2}

**3.** **Balance the equation.**

Mn + AgCl –> Ag + MnCl_{2}

The number of Mn atoms is equal on both sides (both have 1).

The number of Ag atoms is equal on both sides (both have 1).

Next, there is 1 Cl atom on the left and 2 on the right, so balance.

Mn + **2**AgCl –> Ag + MnCl_{2}

But, that makes the atoms of Ag unequal so balance those.

Mn + **2**AgCl –> **2**Ag + MnCl_{2}

Last, double check that all numbers of atoms of each element is equal.

**Answer to Problem:** **Mn + 2AgCl –> 2Ag + MnCl _{2}**

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