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an acid or base which exhibits a colour change on neutralization by the basic or acidic titrant at or near the equivalence point of a titration, aine (nt fenoolftaleiin) või materjal (ainete segu, nt lakmus), mis muudab oma värvust spetsiifilistel pH väärtustel
hape-alusindikaator . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/hape-alusindikaator/1/est (04.07.2026)
