Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Students · pH & Buffer Lab

pH & Buffer Lab for a battery cell

Built for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition. Simulate a battery cell live below — adjust the inputs and watch it respond, right in your browser.

Ph

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pH & pOH CalculatorLive

acids, bases, and the pH scale

3.0

acidic

0714

Controls

pH measures hydrogen-ion concentration on a logarithmic scale. Each unit is a 10× change — pH 3 is ten times more acidic than pH 4.

Presets

Concentration 10⁻ⁿ M (n)

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Data Inspector

pH3.00

pOH11.00

[H⁺]1.0e-3

[OH⁻]1.0e-11

Governing equation

pH = - lo g_{10} [H^{+}] = - lo g_{10} (1.0 e - 3) = 3.00

Reading this result: Acidic: [H⁺] of 1.0e-3 M outnumbers OH⁻, and because pH + pOH always sums to 14, the pOH here is 11.0.

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↓

Titration

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Acid–Base TitrationLive

pH curve · equivalence point

Controls

Add base to an acid and track the pH. The steep jump marks the equivalence point, where moles of acid equal moles of base.

Presets

Acid concentration (M)

Base concentration (M)

Acid volume (mL)

▶ Run in Python

Data Inspector

Equivalence50.0 mL

Typestrong acid + strong base

pH at eq.7.0

Governing equation

C_{a} V_{a} = C_{b} V_{b} \Rightarrow V_{e q} = \frac{0.1 \times 50}{0.1} = 50.0 mL

Reading this result: Equivalence sits near 50.0 mL; because this is a strong acid with a strong base, the pH there is exactly 7 and the jump is nearly vertical.

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Frequently asked questions

Is this good for students?: Yes — this version of "pH & Buffer Lab for a battery cell" is framed for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.