Percent Yield Calculator

How to Calculate Percent Yield

Percent yield is a crucial concept in chemistry that measures the efficiency of a chemical reaction by comparing the actual amount of product obtained to the theoretical maximum amount.

Formula for Percent Yield

The formula for calculating percent yield is:

$$\text{Percent Yield}=\frac{\text{Actual Yield}}{\text{Theoretical Yield}}\times 100\mathrm{\%}$$

Where:

• Actual Yield: The amount of product actually obtained from the reaction
• Theoretical Yield: The maximum amount of product that could be formed based on the limiting reactant

Calculation Steps

1. Determine the theoretical yield using the balanced chemical equation and limiting reactant.
2. Measure the actual yield obtained from the reaction.
3. Divide the actual yield by the theoretical yield.
4. Multiply the result by 100 to express as a percentage.

Example Calculation

Let's calculate the percent yield for a reaction that produces 3.65 g of product when the theoretical yield is 4.22 g:

Step 1: Identify the values

• Actual Yield = 3.65 g
• Theoretical Yield = 4.22 g

Step 2: Apply the formula

Percent Yield = (3.65 g / 4.22 g) × 100%

Step 3: Calculate the result

Percent Yield = 0.8649 × 100% = 86.49%

The percent yield of the reaction is 86.49%.

Visual Representation of Percent Yield

This diagram illustrates the concept of percent yield:

The green area represents the actual yield (86.49% of theoretical), while the red area shows the unreacted or lost portion.