H2S + 2 O2 → H2SO4. It is slightly soluble in water and acts as a weak acid (p Ka = 6.9 in 0.01–0.1 mol/litre solutions at 18 °C), giving the hydrosulfide ion HS−. Hydrogen sulfide and its solutions are colorless. When exposed to air, it slowly oxidizes to form elemental sulfur, which is not soluble in water.

This is “Appendix C: Dissociation Constants and pKa Values for Acids at 25°C”, appendix 3 from the book Principles of General Chemistry (v. 1.0). For details on it (including licensing), click here .

硫化氢（h2s）是一种无色有剧毒的酸性气体，是硫的氢化物中最简单的一种，属于无机化合物，高浓度时无明显气味，低浓度时具有强烈的臭鸡蛋味，浓度极低时便有硫磺味，是许多工业过程中的副产品，例如在天然气提炼、石油炼制、废水处理和造纸工业中 ...

2017年10月27日 · In short, the stronger the acid, the smaller the pKa value and strong acids have weak conjugate bases. pKa values describe the point where the acid is 50% dissociated (i.e. deprotonated). Below are tables that include determined pKa values for various acids as determined in water, DMSO and in the gas Phase.

硫化氢是硫的氢化物，化学式为h2s。一种无色、有恶臭味(臭鸡蛋味)的剧毒气体。能溶于水和乙醇，比重为1.1906。熔点-85.5°c，沸点-60.4°c，临界温度100.4°c，临界压力90.06×105帕。

Hydrogen Sulfide | H2S | CID 402 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

此数据由哈佛大学的David Ripin and David Evans收集，包括以下化合物的 pKa 。 Inorganic Acids Alcohols, Oximes, Hydroxamic Acids, and Peroxides

What is pKa? pKa is a value that indicates how weak or powerful an acid is in simple terms. The pKa of a strong acid is less than zero. pKa is the negative log base ten of the Ka value, to be precise (acid dissociation constant). It determines an acid’s strength, or how tightly a proton is held by a Bronsted acid.

最常用酸碱PKa--PKb表-高中化学,判断酸性、碱性比较难,本文是判断常见酸碱性的PKa、PKb简表。 简单适用,方便理解,容易记忆。 对于高三化学学习,是离不开的拐棍儿。

Values for the negative logarithm of the acid dissociation constant, pKa, of the conjugated acid of amines, diamines and cyclic organic nitrogen compounds, shown together with the molecular structure of the acids.