相关实验视频

Updated: Jul 11, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
13:29

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

硫酸离子作为硫酸的中间体在酸雨形成中的硫酸酸

S G Chang, D Littlejohn, K Y Hu

    Science (New York, N.Y.)
    |August 14, 1987
    PubMed
    概括

    一个新的中间体,可能是二硫酸盐离子,是在氧气对二硫酸盐的氧化过程中形成的. 这种中间体,通过拉曼光谱检测,在化成硫酸盐产品之前,半衰期很短.

    更多相关视频

    Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand08:01

    Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

    Published on: September 8, 2016

    Imaging Corrosion at the Metal-Paint Interface Using Time-of-Flight Secondary Ion Mass Spectrometry07:24

    Imaging Corrosion at the Metal-Paint Interface Using Time-of-Flight Secondary Ion Mass Spectrometry

    Published on: May 6, 2019

    相关概念视频

    Precipitation Reactions03:10

    Precipitation Reactions

    In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
    Ions as Acids and Bases02:54

    Ions as Acids and Bases

    Salts with Acidic Ions
    Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
    Formation of Complex Ions03:45

    Formation of Complex Ions

    A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
    Precipitation of Ions03:11

    Precipitation of Ions

    Predicting Precipitation
    The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
    Acid Halides to Esters: Alcoholysis01:12

    Acid Halides to Esters: Alcoholysis

    Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
    Precipitation and Co-precipitation01:17

    Precipitation and Co-precipitation

    Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...