reducingsubstance
nounUK /rɪˈdjuːsɪŋ ˈsʌbstəns/
US /rɪˈduːsɪŋ ˈsʌbstəns/
A reducing substance is something that gives away electrons to another thing in a chemical reaction.
In the experiment, the reducing substance donated electrons to the metal ions.
OTHER MEANINGS
2. A substance that removes oxygen from a compound or adds hydrogen to it.
Hydrogen gas acts as a reducing substance when it removes oxygen from metal oxides.
3. A compound that can decolorize or reduce certain dyes and indicators.
The reducing substance in the solution caused the blue dye to fade.
4. A material used in metallurgy to extract metals from their ores.
Carbon is used as a reducing substance in the smelting of iron ore.