Calculator
Formula Used
Volume conversion: volume in mL = entered volume × unit factor.
Density conversion: density in g/mL = entered density × unit factor.
Gross actual mass: actual mass = density × volume.
Corrected actual mass: corrected mass = gross mass × purity fraction × dry factor.
Direct yield: percent yield = corrected actual mass ÷ theoretical mass × 100.
Stoichiometry: theoretical mass = limiting moles × product coefficient ÷ limiting coefficient × product molar mass.
Mass difference: difference = theoretical mass − corrected actual mass.
How to Use This Calculator
- Enter the reaction name and product name.
- Add collected product volume and its volume unit.
- Enter density and select the matching density unit.
- Add purity and dry product factors when needed.
- Choose direct theoretical mass or stoichiometry mode.
- For stoichiometry, enter limiting reagent data and coefficients.
- Press Calculate to show the result above the form.
- Use CSV or PDF buttons to save the report.
Example Data Table
| Product | Volume | Density | Purity | Theoretical Yield | Percent Yield |
|---|---|---|---|---|---|
| Liquid ester | 22.4 mL | 0.902 g/mL | 96% | 25.8 g | 75.18% |
| Organic oil | 15.0 mL | 1.040 g/mL | 98% | 18.2 g | 84.00% |
| Distillate | 31.5 mL | 0.785 g/mL | 92% | 29.0 g | 78.40% |
Percent Yield With Density Overview
Percent yield shows how much product a reaction delivered. Density adds another useful path. Many liquid products are measured by volume first. The calculator turns that volume into mass before yield is tested. This helps when a product is collected as oil, solution, distillate, or dense liquid.
Why Density Matters
Mass is needed for percent yield. A balance gives mass directly. A cylinder or flask gives volume. Density connects both measurements. The relation is simple. Mass equals density multiplied by volume. The tool also applies purity and dry product factors. These corrections make the actual yield closer to the usable product amount.
Advanced Reaction Planning
Theoretical yield can be entered directly. It can also be built from stoichiometry. Enter the limiting reagent mass, molar mass, and coefficients. Then enter the product molar mass and coefficient. The calculator finds reagent moles, product moles, and theoretical product mass. This gives a full audit trail for lab notebooks.
Reading the Result
A high percent yield means strong recovery. A low value may show transfer loss, side reactions, evaporation, poor separation, or wet samples. A result over one hundred percent usually means water, solvent, impurity, wrong density, or wrong theoretical yield. The status note helps flag these cases.
Best Lab Practice
Use consistent units. Record the temperature used for density. Many densities change with temperature. Use calibrated glassware for volume. Use product purity from assay data when possible. If the product is wet, enter the dry factor. Keep three to four decimals for formal reports. Fewer decimals are easier for class work.
Useful Outputs
The result table gives gross mass, corrected actual mass, theoretical mass, percent yield, and loss. Export the same values to CSV for spreadsheets. Download a PDF for quick documentation. Use the example table to compare sample reactions. This calculator supports teaching, lab checks, and repeatable chemistry reporting.
Limits And Review
The calculator is a planning and reporting aid. It does not replace analytical testing. Always confirm product identity with suitable methods. Check density sources against your solvent, temperature, and concentration. Review significant figures before submission. Save raw observations with every export. Good records make percent yield easier to defend later during final formal laboratory review.
FAQs
What is percent yield?
Percent yield compares the actual product collected with the theoretical product expected. It shows recovery efficiency as a percentage.
Why use density in yield calculations?
Density converts liquid volume into mass. Percent yield needs mass, so density is helpful when the product is measured by volume.
Can I use this for solid products?
Yes, if you know the solid mass directly. For density-based use, the product should have a reliable density and measured volume.
What does purity percent mean?
Purity percent adjusts the collected mass to estimate only the desired product. It removes the effect of impurities in the sample.
What does dry product factor mean?
The dry product factor adjusts for moisture or retained solvent. Use 100 percent when the sample is already dry.
Why is my yield over 100 percent?
A yield over 100 percent often means retained solvent, water, impurity, wrong density, wrong volume, or an underestimated theoretical yield.
Which theoretical mode should I choose?
Choose direct mode when theoretical yield is already known. Choose stoichiometry mode when it must be calculated from limiting reagent data.
Can I download results?
Yes. Use the CSV button for spreadsheets. Use the PDF button for a simple printable record.