溶解

• 読み: ようかい
• ローマ字: youkai
• 漢字の分解: 溶 (you) — melt, dissolve; 解 (kai) — disentangle, break down, solve
• 発音: /joː.kaɪ/

意味

Dissolution; melting; the process by which a substance is dissolved into a solvent to form a solution, or more broadly, something being broken down and absorbed.

In chemistry, 溶解 describes the process of a solute (溶質) dispersing in a solvent (溶媒) to form a homogeneous mixture. It differs from melting (融解) in that the substance disperses into another medium rather than merely changing phase. 溶解度 (solubility) measures the maximum amount that can dissolve. Also used figuratively to describe the breakdown of boundaries, identities, or structures.

例文

1. 食塩が水に溶解するとナトリウムイオンと塩化物イオンに分かれる。
2. 温度が上がるほど多くの物質が溶解しやすくなるが、気体の場合は逆の傾向がある。
3. グローバル化によって国家間の文化的境界が溶解しつつあると指摘する研究者もいる。

使い方ガイド

場面: chemistry, physics, biology, social science

トーン: descriptive

起源と歴史

Compound of 溶 (melt, dissolve) + 解 (disentangle, break down). Both characters contribute the sense of a solid or structured entity coming apart within a medium.

文化的背景

時代: Meiji–Modern

世代: Adults (educated)

社会的背景: Universal (educated)