promotion image of download ymail app
david asked in 科學及數學生物學 · 1 decade ago

BIOlogy 的問題

我本書話water 可以act as a reactant...


我想要詳盡圴解釋 同例子




中文譯係 叫 水解..


3 Answers

  • Roy
    Lv 5
    1 decade ago
    Favorite Answer



    Hydrolysis is a chemical reaction during which one or more water molecules are split into hydrogen and hydroxide ions which may go on to participate in further reactions.[1][2] It is the type of reaction that is used to break down certain polymers, especially those made by step-growth polymerization. Such polymer degradation is usually catalysed by either acid or alkali attack, often increasing with their strength or pH.

    Hydrolysis is distinct from hydration, where hydrated molecule does not "lyse" (break into two new compounds). It should not be confused with hydrogenolysis, a reaction of hydrogen.

    Metal ions are Lewis acids, and in aqueous solution they form aqua ions, of the general formula M(H2O)nm+. [4] [5] The aqua ions are hydrolyzed, to a greater or lesser extent. The first hydrolysis step is given generically as

    M(H2O)nm+ + H2O ⇌ M(H2O)n-1(OH)(m-1)+ + H3O+

    Thus the aqua ion is behaving as an acid in terms of Brønsted-Lowry acid-base theory. This is easily explained by considering the inductive effect of the positively charged metal ion, which weakens the O-H bond of an attached water molecule, making the liberation of a proton relatively easy.Under physiological conditions (i.e. in dilute aqueous solution), a hydrolytic cleavage reaction, where the concentration of a metabolic precursor is low (on the order of 10-3 to 10-6 molar), is essentially thermodynamically irreversible. To give an example:

    A + H2O → X + Y

    Assuming that x is the final concentration of products, and that C is the initial concentration of A, and W = [H2O] = 55.5 molar, then x can be calculated with the equation:

    p.s.There are different meaning in different subjects!

    2008-10-30 16:37:12 補充:

    let Kd×W = k:


    For a value of C = 0.001 molar, and k = 1 molar, x/C > 0.999. Less than 0.1% of the original reactant would be present once the reaction is complete.

    2008-10-30 16:37:20 補充:

    M(H2O)nm+ + H2O ⇌ M(H2O)n-1(OH)(m-1)+ + H3O+

    2008-10-30 16:37:36 補充:

    example, aqueous solutions of Cr(VI) contain CrO42-.

    Cr(H2O)6+ → CrO42- + 2 H2O + 8 H+

    Note that reactions such as

    2 CrO42- + H2O ⇌ Cr2O72- + 2 OH-

    are formally hydrolysis reactions as water molecules are split up yielding hydroxide ions. Such reactions are common among polyoxometalates.

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    您信我用這方法可以幫助您解決身體問題, 碧咸球隊都是用它.

    你係咪想型d, fit d又健康d?

    我個女13歲, 都是用這方法, 一個月減10磅, 三個月減20磅.

    改善鼻敏感, 流鼻血, 靚咗, FIT咗, 讀書仲好咗, 仲拿第一添.

    我做文職, 133磅, 160CM , 用咗簡單又健康既方法!

    我用左4個月減左20磅, 改善頭痛,胃痛, 暈車浪,植物曲脹, 越來越fit!面色仲好過以前!

    網站可以增肥, 減肥, 改善身形, 健康, 體重控制,


    [[有營養顧問免費跟進^^ ]]

    TEL: 93227176 阿紅

    • Commenter avatarLogin to reply the answers
  • 1 decade ago

    reactant = 反應劑



    反應原料 - 用於反應原料和C的大宗氧氣、氮氣、二氧化碳、一氧化碳、氫氣。


    hydrolyse = 水解





    • Commenter avatarLogin to reply the answers
Still have questions? Get your answers by asking now.