Explore the Molarity & Dilution Simulator
Dissolve a solute, see the concentration, and work out how much water to add to dilute it. Free, no signup, runs in your browser.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
See it in action
The Molarity & Dilution Simulator with sample data entered and the result showing.
What is the Molarity & Dilution Simulator?
Dissolve a solute, see the concentration, and work out how much water to add to dilute it. It runs in your browser, so a change to a setting or a drag on an object shows up at once.
Chemists, nurses and pharmacists dilute stock solutions every day, from lab reagents to medicines and cleaning products. Molarity is the standard way to state a concentration.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Molarity = moles of solute ÷ litres of solution.
Mass of solute = moles × molar mass.
Dilution keeps the moles constant: M1 × V1 = M2 × V2.
Dissolve 0.5 mol in 0.5 L and read the molarity.
Dilute to half the concentration and find the water needed.
Change the solute and compare the mass.
Used for
Pick one to see how it fits.
Chemistry learners
Chemistry students from middle school to university, teachers who need a virtual demonstration, and anyone without access to a lab.
Try it freeTeachers
For teachers: project the Molarity & Dilution Simulator on the board, let students predict the result, then run it together and test this: Dilute to half the concentration and find the water needed. For students: change one thing at a time and write down what changes.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This simulation | Textbook diagram | |
|---|---|---|
| Interactive | Drag, tap and change settings | Fixed picture |
| Install | Nothing to install | Not needed |
| Cost | Free to use | Depends on the book |
Questions people ask
How do I dilute a solution to a lower concentration?
Use M1V1 = M2V2. Find the final volume V2 = M1V1 / M2, then subtract V1 to get the volume of water to add.
Does adding water change the number of moles?
No. Adding solvent only changes the volume, so the moles of solute stay the same and the concentration drops.
Is the Molarity & Dilution Simulator free to use?
Yes. The Molarity & Dilution Simulator is free, needs no signup or download and runs in your web browser. It is part of the Chemistry group of AZRS simulations.
Does the Molarity & Dilution Simulator work on a phone or tablet?
Yes. The Molarity & Dilution Simulator takes touch input as well as mouse input, so you can use its 6 adjustable settings with a finger. A larger screen makes the controls and graphs easier to read.
How do I use the Molarity & Dilution Simulator?
1. In the Molarity & Dilution Simulator, use the controls to change Solute, Your compound: molar mass, Your compound: colour, Amount of solute, Solution volume, and more. The simulation reacts instantly. 2. In the Molarity & Dilution Simulator, press "Dilute to target", "+ 0.1 L water" to start, reset or change what is happening. 3. Start with this experiment: Dissolve 0.5 mol in 0.5 L and read the molarity. Drag any glowing handle, object or slider with your mouse or finger and the Molarity & Dilution Simulator responds in real time. 4. Change one setting at a time and watch which readout moves, then compare it with this idea: Molarity = moles of solute ÷ litres of solution.
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Try the Molarity & Dilution Simulator now
Dissolve a solute, see the concentration, and work out how much water to add to dilute it. Free to use.
Try it free