What is the Standard Solution Calculator?
Prepare analytical standard solutions with this free standard solution calculator. Calculate mass to weigh from solid, stock aliquot for dilution (C₁V₁=C₂V₂), and verify actual molarity after preparation. Get step-by-step volumetric flask procedures for chemistry lab work. Runs instantly in your browser.
How to use the Standard Solution Calculator
- Choose Prepare from Solid, Dilute from Stock, or Verify Concentration.
- Enter the chemical formula (molar mass is looked up automatically) or override molar mass.
- Set target molarity and volumetric flask volume (L or mL).
- For dilution, enter stock concentration and final volume — get the pipette volume.
- Copy the lab procedure and calculation steps for your notebook.
Common use cases
- Preparing 0.100 M NaCl primary standards in volumetric flasks
- Diluting 1.0 M stock HCl to working 0.10 M standards
- Calculating mass for K₂Cr₂O₇ primary standard solutions
- Verifying actual molarity after weighing and dilution
- Teaching analytical chemistry lab preparation techniques
Frequently asked questions
- What is a standard solution?
- A standard solution has a precisely known concentration, usually expressed in mol/L (molarity). It is used to calibrate instruments, titrations, and other analytical procedures.
- How do I prepare a standard solution from solid?
- Weigh the calculated mass of solute, dissolve in a volumetric flask, and dilute to the mark. Mass = M × V × molar mass, where M is target molarity and V is volume in liters.
- How much stock solution do I pipette?
- Use C₁V₁ = C₂V₂. Stock volume V₁ = (C₂ × V₂) / C₁. Pipette V₁ of stock into a volumetric flask and dilute to final volume V₂.
- Can I verify my prepared concentration?
- Yes. Enter the mass weighed, formula, and final volume. The calculator computes actual molarity and optionally compares it to your target.
- What is the difference from a molarity calculator?
- This tool focuses on standard-solution lab workflow: mass to weigh, dilution aliquots, volumetric flask procedures, and concentration verification — not just the raw M = n/V formula.
