stannous

Thân thiện

A scientist adds stannous chloride to a test tube.

Definition

1. Adjective:
   • Relating to or containing tin, especially with a valence of two: "Stannous" specifically describes compounds or ions where tin exhibits a +2 oxidation state. It distinguishes this from "stannic," which refers to tin in a +4 oxidation state.

Usage Examples

• Adjective:
  • Stannous fluoride is a common ingredient in some toothpastes. (This describes a specific compound containing tin(II).)
  • The chemist prepared a stannous chloride solution for the experiment. (This indicates the solution contains tin in its +2 state.)
  • The analysis confirmed the presence of stannous ions. (This refers to the Sn²⁺ ions specifically.)

Advanced Usage

• Chemical Nomenclature: The term is primarily used in chemistry to specify the oxidation state of tin. The "ous" suffix traditionally denotes the lower of two common oxidation states for a metal.
  • The stannous form of the compound is more reactive than the stannic form.
• Technical/Industrial Contexts: Used in fields like electroplating, metallurgy, and materials science.
  • A stannous bath is used for tin electroplating.

Variants and Related Words

• Stannic (adj): Of or relating to tin, especially with a valence of four (Sn⁴⁺).
  • Stannic oxide is also known as tin(IV) oxide.
• Tin (n): The metallic element (Sn) itself.
• Stannate (n): A salt containing the anion SnO₃²⁻.

Synonyms

• Tin(II): The modern IUPAC nomenclature equivalent, indicating the +2 oxidation state.
  • Stannous chloride is synonymous with tin(II) chloride.

Notes on Meaning

The word "stannous" has a single, precise technical meaning. It is not used in everyday language and does not have idiomatic expressions or phrasal verbs. Its usage is confined to scientific and industrial contexts where specifying the oxidation state of tin is necessary.

Học thuật

Adjective

1. of or relating to or containing tin

Từ đồng nghĩa

• stannic