phenolphthalein
Turns pink, alkaline
Phenolphthalein is a chemical compound used as an acid-base indicator in chemistry.
It turns bright pink or magenta in alkaline solutions and remains colorless in acidic ones, making it useful for titrations: The solution turned pink when we added the final drop, indicating the endpoint.
It was formerly used as a laxative but has been largely withdrawn due to safety concerns.
Alteration of hue
- endpointFinal point reached
- acid-baseProton donor-acceptor chemistry
- alkalineHaving high pH
- basicFundamental in nature
neutral · titration · visual cue · pink · colorless · chromophore · detection · lactone
Calibrated tube for titration
- endpointFinal point reached
- equivalence pointComplete neutralization moment
- analyteSubstance being measured
- standardizationImplementing uniform technical specifications
stoichiometry · neutralization · molarity · concentration · pipette · moles · standard solution
Substance prompting chemical change
- organic compoundCarbon-bonded chemical substance
- aromaticPleasantly strong-smelling
- triphenylmethaneHydrocarbon with three benzene rings
- synthesisCombining parts into whole
solubility · crystalline · white powder · melting point · chemical reaction · laboratory · analytical chemistry · molecular structure
Substance inducing evacuation
- catharticEmotionally releasing, relieving
- bowel movementFecal discharge from body
- discontinuedNo longer available
- withdrawnEmotionally distant, disengaged
carcinogenic · medical use · over-the-counter · pharmaceutical · gastrointestinal · side effects · dosage
color change
Alteration of hue
basic · neutral · titration · visual cue · pink · colorless · chromophore · detection · lactone
burette
Calibrated tube for titration
- endpointFinal point reached
- equivalence pointComplete neutralization moment
- analyteSubstance being measured
standardization · stoichiometry · neutralization · molarity · concentration · pipette · moles · standard solution
reagent
Substance prompting chemical change
- organic compoundCarbon-bonded chemical substance
- aromaticPleasantly strong-smelling
- triphenylmethaneHydrocarbon with three benzene rings
synthesis · solubility · crystalline · white powder · melting point · chemical reaction · laboratory · analytical chemistry · molecular structure
purgative
Substance inducing evacuation
- catharticEmotionally releasing, relieving
- bowel movementFecal discharge from body
- discontinuedNo longer available
withdrawn · carcinogenic · medical use · over-the-counter · pharmaceutical · gastrointestinal · side effects · dosage
- lab suppliesbeakers, beaker, test tubes, test tube, pipettes
- laxativeslaxative, laxatives, stool softener, stool softeners, cathartic
- pHacidic, alkaline, neutral, acidity, acid
- Titrationtitration, analyte, endpoint, burette, buret
- Forensic Chemicalsluminol, fingerprint powder, fluorescein, silver nitrate
- lab reagentsreagent, buffer, buffers, formalin, pyridine