Concentration & pH Calculator (Step-by-Step)

Q: What concentration calculations does this tool support?

You can compute molarity, mass percent (w/w), mass/volume percent (w/v), M1V1 dilution, mixing of the same solute, and convert w/w% to molarity. Every mode shows the unit normalization and algebraic steps alongside the result.

Q: Which assumptions are used for the pH modes?

Strong acids/bases use Kw = 1.0×10^-14 at 25 °C with trace water ionization. Weak acids/bases show both the exact quadratic solution and the √(K·C) approximation with a 5% check. Buffer and acid-base mixing rely on mole balances and the Henderson–Hasselbalch equation.

Mode Significant figures

Input method From solute mass + molar mass From amount of substance (mol)

Solute mass Mass unit Molar mass (g/mol)

Moles n (mol)

Solution volume Volume unit

Result

How it’s calculated

Teacher Notes

FAQ

What concentration calculations does this tool support?

Molarity, mass percent (w/w), mass/volume percent (w/v), M1V1 dilution, mixing of the same solute, and converting w/w% to molarity. Each mode shows unit normalization and substitution steps beside the result.

Which assumptions are used for the pH modes?

Strong acids/bases use Kw = 1.0×10^-14 at 25 °C with water’s self-ionization in dilute ranges. Weak acids/bases show both the exact quadratic root and the √(K·C) approximation with an automatic 5% rule check. Buffers rely on the Henderson–Hasselbalch equation, and strong acid/base mixing uses mole differences over the total volume.

Result

How it’s calculated

Teacher Notes

FAQ

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