“carbonic acid”的概念、定义、翻译、参考文献-科学参考

carbonic acid

Chemistry

A dibasic acid, H₂CO₃, formed in solution when carbon dioxide is dissolved in water:
${CO}_{2} (aq) + H_{2} O (l) ⇌ H_{2} {CO}_{3} (aq)$
The acid is in equilibrium with dissolved carbon dioxide, and also dissociates as follows:
$\begin{array}{l} H_{2} {CO}_{3} ⇌ H^{+} + {HCO}_{3}^{-} \\ K_{a} = 4.5 \times 10^{- 7} mol {dm}^{- 3} \\ {HCO}_{3}^{-} ⇌ {CO}_{3}^{2 -} + H^{+} \\ K_{a} = 4.8 \times 10^{- 11} mol {dm}^{- 3} \end{array}$
The pure acid cannot be isolated, although it can be produced in ether solution at –30°C. Carbonic acid gives rise to two series of salts: the carbonates and the hydrogencarbonates.

Biology

A weak acid, H₂CO₃, formed in solution when carbon dioxide is dissolved in water:
${CO}_{2} + H_{2} O ⇌ H_{2} {CO}_{3}$
The acid is in equilibrium with dissolved carbon dioxide, and also dissociates into hydrogencarbonate and hydrogen ions. These reactions, catalysed by carbonic anhydrase, take place in the red blood cells when carbon dioxide diffuses into them from the surrounding tissue cells. It is a component in a key natural buffer system that maintains the pH of body fluids at a certain level. See also hydrogencarbonate.

单词	carbonic acid
释义	carbonic acid Chemistry A dibasic acid, H₂CO₃, formed in solution when carbon dioxide is dissolved in water: ${CO}_{2} (aq) + H_{2} O (l) ⇌ H_{2} {CO}_{3} (aq)$ The acid is in equilibrium with dissolved carbon dioxide, and also dissociates as follows: $\begin{array}{l} H_{2} {CO}_{3} ⇌ H^{+} + {HCO}_{3}^{-} \\ K_{a} = 4.5 \times 10^{- 7} mol {dm}^{- 3} \\ {HCO}_{3}^{-} ⇌ {CO}_{3}^{2 -} + H^{+} \\ K_{a} = 4.8 \times 10^{- 11} mol {dm}^{- 3} \end{array}$ The pure acid cannot be isolated, although it can be produced in ether solution at –30°C. Carbonic acid gives rise to two series of salts: the carbonates and the hydrogencarbonates. Biology A weak acid, H₂CO₃, formed in solution when carbon dioxide is dissolved in water: ${CO}_{2} + H_{2} O ⇌ H_{2} {CO}_{3}$ The acid is in equilibrium with dissolved carbon dioxide, and also dissociates into hydrogencarbonate and hydrogen ions. These reactions, catalysed by carbonic anhydrase, take place in the red blood cells when carbon dioxide diffuses into them from the surrounding tissue cells. It is a component in a key natural buffer system that maintains the pH of body fluids at a certain level. See also hydrogencarbonate.
随便看	numerical integration numerical linear algebra numerical methods numerical modality numerical modelling numerical stability numerical taxonomy numerical value numlock Nummulites Nuna nunatak Nunivak Nunki Nupe nuptiality NURBS Nuremberg Trials (1945–46) Nussbaum, Martha (1947– ) Nusselt number NuSTAR nut nutation nutation in right ascension nutcracker