Molarity Lab
Pick a solute, set the grams (or moles) and the volume — and watch molarity M = mol/L come alive as the colour deepens.
Pick a solute
Amount of solute
Molarity
M = 1 mol / 1 L = 1 mol/L
Molarity is moles per litre: M = n / V. More solute or less volume = higher concentration.
Dilution helper
Adding water lowers the molarity while the moles of solute stay the same (M₁V₁ = M₂V₂). Enter a lower target concentration to find the volume.
To reach 0.5 mol/L, top up to 2 L total — add about 1 L of water.
Molarity is the chemist's measure of concentration: M = n/V, the number of moles of solute dissolved per litre of solution. To get the moles, you convert the mass in grams using the solute's molar mass (grams per mole) — so 58.44 g of table salt is exactly 1 mole, and dissolving it in 1 litre gives a 1 mol/L solution. Add more solute and the colour deepens; add water and it dilutes (M₁V₁ = M₂V₂); push past the solubility limit and the extra just won't dissolve — the solution is saturated.
Sources & formulas
- M = n / V (mol/L)
- n = grams / molar mass (g/mol)
- M₁V₁ = M₂V₂ (dilution)
- en.wikipedia.org/wiki/Molar_concentration
- en.wikipedia.org/wiki/Molar_mass
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