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Labs
labs.ilearnstem.ca — Virtual Science Laboratories
Ontario Curriculum · Grades 9–12
Beta
STOPCOCK CLOSED
NaOH added
0.00 mL
pH probe
1.00
Burette left
50.0 mL
Indicator: colorless
Chemistry Lab 01 · Acid–Base Titration — drag to orbit, scroll to zoom
Bench
Curriculum
Data
Sample
Practice
Unknown
Analyte
Pipette volume
25.00 mL
Titrant (burette)
NaOH 0.1000 M
Indicator
Phenolphthalein
Stopcock
Closed
Dropwise
Fast
Technique: run fast until ~1 mL before the expected endpoint, then switch to dropwise.
Record endpoint
Refill
Titration curve — pH vs mL NaOH
pink band = phenolphthalein range
Equivalence at 25.00 mL (hidden in Unknown mode — find it yourself)