| 词汇 | hydroxyl-ion |
| 释义 | hydroxyl ion noun[ C ] chemistry specializeduk /haɪˌdrɒk.sɪl ˈaɪən/ us /haɪˌdrɑːk.sɪl ˈaɪ.ən/ an ion with a negative charge, consisting of an oxygen atom and a hydrogen atom氢氧离子;羟离子（有一个氧原子和一个氢原子组成的带有负电荷的离子） Physics: atoms, molecules & sub-atomic particles acceptor alpha particle anti-radical antilepton antimatter antineutrino benzene ring beta decay beta particle hadron Higgs boson interatomic interelectronic interionic molecularly monatomic multi-molecular multiparticle muon positron Examples of hydroxyl ionhydroxyl ion Ion exchange using natural or synthetic resins removes calcium, magnesium and carbonate ions from water, replacing them with hydrogen and hydroxyl ions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It forms a series with the more common hydroxylherderite, which has more hydroxylion than fluoride. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Their hydrolysis occurs when the nucleophile (a nucleus-seeking agent, e.g., water or hydroxylion) attacks the carbon of the carbonyl group of the ester or amide. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This applies in general: any equilibrium constant is equally valid for a product with an oxide ion as for the product with two hydroxyl ions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In an aqueous base, hydroxyl ions are better nucleophiles than polar molecules such as water. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In alkaline solutions, nucleophilic hydroxyl ions attack the electrophilic central carbon to produce the colourless triphenylmethanol or carbinol form of the dye. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Marked increases or decrease in conductance are associated with the changing concentrations of the two most highly conducting ionsthe hydrogen and hydroxyl ions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The positive hydronium ions that approach the negative cathode mostly combine with negative hydroxyl ions to form water. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Photolysis of water vapor and carbon dioxide produces hydroxyl ions and atomic oxygen, respectively, and these in turn produce oxygen in small concentrations, with hydrogen escaping into space. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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