크로뮴산-다이크로뮴산 평형

2CrO42− + 2H+ ⇌ Cr2O72− + H2O

개요

Chromate (yellow, CrO₄²⁻) converts to dichromate (orange, Cr₂O₇²⁻) in acidic solution and vice versa in basic solution. This pH-dependent equilibrium involves condensation of two tetrahedral chromate units. While chromium remains at +6 throughout, this equilibrium is fundamental to Cr(VI) redox chemistry.

참여 물질

역할 물질 계수 상태
생성물 H₂O 1 (l)

일상 속 예시

Adding acid to yellow potassium chromate solution turns it orange, and adding base reverses it, demonstrating Le Chatelier's principle.

산업적 중요성

크롬산/이크롬산 평형은 크롬 도금, 가죽 무두질, 그리고 Cr(VI) 환경 오염의 이해에 중요합니다.

자주 묻는 질문

What is the equation for 크로뮴산-다이크로뮴산 평형?
The balanced equation is: 2CrO₄²⁻ + 2H⁺ ⇌ Cr₂O₇²⁻ + H₂O.
What type of reaction is 크로뮴산-다이크로뮴산 평형?
크로뮴산-다이크로뮴산 평형 is a 산화·환원 reaction. It is reversible under certain conditions.
Is 크로뮴산-다이크로뮴산 평형 exothermic or endothermic?
크로뮴산-다이크로뮴산 평형 is exothermic (releases energy). The enthalpy change (ΔH) is -14.0 kJ/mol.