Liquid Solution Molarity Calculator
This liquid solution molarity calculator finds the molar concentration of liquid reagents from their density, purity, and molar mass. Use it for concentrated liquid chemicals like glacial acetic acid, formaldehyde, ethanol, methanol, and other organic solvents.
Liquid Solution Molarity Calculator
Density × Purity → Molarity
M = (density × purity% × 1000) / MW What is Liquid Solution Molarity?
Liquid solution molarity calculates the molar concentration of a pure or concentrated liquid chemical from its physical properties. Unlike solid solutes where you weigh and dissolve, liquid reagents come with a density and purity on the label.
The formula: M = (density × purity fraction × 1000) ÷ molar mass. The factor of 1000 converts g/mL to g/L.
This is essential for concentrated liquid reagents: glacial acetic acid (17.4 M), 37% formaldehyde (12.3 M), absolute ethanol (17.1 M), and concentrated ammonia (14.8 M).
Liquid Solution Molarity Formula
The formula for calculating molarity from liquid solution molarity:
To use this formula, you need density, purity percentage, and molar mass. The calculator handles all unit conversions automatically.
Enter your values below to see the liquid solution molarity formula in action.
Where mass is in grams (g), volume is in liters (L), and molar mass is in g/mol.
How to Calculate Liquid Solution Molarity
Follow these steps to calculate molarity from liquid solution molarity:
- Identify the liquid solution molarity of your solute and gather all known values.
- Find the molar mass of the substance from the periodic table or a chemical database.
- Enter your liquid solution molarity value and select the appropriate unit from the dropdown.
- Enter the volume of the solution in liters (L) or select another volume unit.
- Click Calculate to get the molarity result instantly.
- Verify the result using the step-by-step breakdown provided by the calculator.
Liquid Solution Molarity Calculator Examples
The examples below show how to use the liquid solution molarity calculator in practice.
Example 1: What is the molarity of glacial acetic acid? Density 1.049 g/mL, 99.7% purity, MW 60.05 g/mol → M = (1.049 × 0.997 × 1000) / 60.05 = 17.4 M.
Example 2: Using the formula: molarity = moles ÷ volume, compute the result and verify with the calculator above.
Example 3: Enter your own values into the calculator to see personalized step-by-step results.
Molarity Calculator Tools
Explore our collection of 20 specialized molarity calculators. Each tool is designed for a specific type of calculation with its own unique input fields and formulas.
FAQs
How do you calculate molarity of a liquid reagent?
M = (density × purity fraction × 1000) ÷ molar mass. This works for concentrated liquid acids, bases, and solvents.
What is the molarity of glacial acetic acid?
Density 1.049 g/mL, 99.7% purity, MW 60.05 g/mol → M = (1.049 × 0.997 × 1000) / 60.05 = 17.4 M.
Why do liquid reagents need this formula?
Because liquid reagents are sold by density and purity, not by molarity. This formula converts those values to a useful molar concentration.
What units does the Liquid Solution Molarity Calculator support?
The liquid solution molarity calculator supports mass units (g, mg, µg, kg), volume units (L, mL, µL, gal), molar mass (g/mol, kg/mol), and molarity units (M, mM, µM, nM, pM, fM, aM).
Is the Liquid Solution Molarity Calculator free to use?
Yes. The liquid solution molarity calculator is 100% free, requires no sign-up, and works on all devices. All calculations are performed instantly in your browser.