| 词汇 | example_english_weak-acid |
| 释义 | Examples of weak acidThese 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. By contrast, the application of sodium butyrate (weakacid) caused a fall in the ratio. What makes these compounds basic is that the conjugate base from the weakacid hydrolyzes to form a basic solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The electrolytes are generally composed of a weakacid, a salt of weakacid, and a solvent, and optional thickening agent and other additives. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The latter is treated with an alcohol respective to the desired phosphite protecting group, for instance, 2-cyanoethanol, in the presence of a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is due to the fact that symptoms of these patients are the results of weakacid or non-acid reflux. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A complicating factor is that water itself is a weakacid and a weak base. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Didanosine has weakacid stability and is easily damaged by stomach acid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Titrations between a weakacid and a weak base have titration curves which are highly irregular. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The sloog contains a weakacid that slows the expansion of the polymer so that the growth appears to occur over several days. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In contrast, a weakacid only partially dissociates and at equilibrium both the acid and the conjugate base are in solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the simplest case, the weakacid is the only compound in water. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Upon protonation, the unstable weakacid nitrous acid is produced. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The end product, humus, is soluble in water and forms a weakacid that can attack silicate minerals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A weakacid dissolves calcite from crushed limestone, leaving only dolomite, silicates, or quartz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is usually prepared as an aqueous solution where it acts as a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Carbonic acid, which is a weakacid, forms two kinds of salts, the carbonates and the bicarbonates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, the titration curve for the titration between oxalic acid (a weakacid) and sodium hydroxide (a strong base) is pictured. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The diketone 2,4-pentanedione (acetylacetone) is also a weakacid because of the keto-enol equilibrium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A weakacid is an acid that dissociates incompletely, releasing only some of its hydrogen atoms into the solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, there is great synthetic utility in the variety of reactions one can carry out, by varying the diazoalkyl and weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Acetic acid is a weakacid so it only ionizes slightly. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For a simple numerical example, take the case where the concentrations of the weakacid and its salt are equal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The ketene can be trapped with any weakacid, such as an alcohol or amine, to form the ester or amide. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Dissolved in water, hydrogen sulfide is known as hydrosulfuric acid or sulfhydric acid, a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, a weakacid or base will not necessarily have a strong conjugate base or acid; there are a number of pairs of weak conjugates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mining was proposed to be an in-situ leach operation, pumping a weakacid solution into the formation that dissolves the uranium-bearing ore. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The compound can be regarded as a salt of the weakacid, acetylene. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The plant is kept in soft, weakacid water in a shaded location. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Single-potential amperometry has been used to detect weakacid anions, such as cyanide and sulfide, which are problematic by conductometric methods. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The solubility of limestone in water and weakacid solutions leads to karst landscapes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although hydrofluoric acid is regarded as a weakacid, it is very corrosive, even attacking glass when hydrated. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In these substances the hydride bond is formally a covalent bond much like the bond made by a proton in a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The typical definition of a weakacid is any acid that does not dissociate completely. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The strength of a weakacid is represented as either an equilibrium constant or as a percent dissociation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In contrast, a weakacid only partially dissociates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Activation is done with a weakacid etch, or nickel strike or, in the case of non-metallic substrate, a proprietary solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It stains weakacid fast but loses this trait upon being grown in culture. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It can be produced from chlorophyll by treatment with a weakacid, producing a dark bluish waxy pigment. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although it is classified as a weakacid, concentrated acetic acid is corrosive and can attack the skin. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The hides are then rinsed to remove the lime, any residue being neutralised with a weakacid solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The electrodes were copper for the cathode and zinc for the anode, with the electrolyte consisting of vinegar or some other weakacid, or a salt solution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When a weakacid reacts with a weak base, the equivalence point solution will be basic if the base is stronger and acidic if the acid is stronger. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As a result a strong acid such as perchloric acid exhibits more strongly acidic properties than a weakacid such as acetic acid when dissolved in a weakly basic solvent. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The base deprotonates the methylene, yielding an enolate, which reacts with tosylazide and subsequently decomposes in the presence of a weakacid, to give the -diazo-1,3-diketone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Uracil is a weakacid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The solubility of limestone in water and weakacid solutions leads to karst landscapes, in which water erodes the limestone over thousands to millions of years. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Even though it is chemically only a weakacid, it is far more dangerous than the conventional strong mineral acids, such as nitric acid, sulfuric acid, or hydrochloric acid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They are usually extracted from limestone by placing the limestone in a weakacid, typically acetic acid; the phosphatized fossils remain after the rock is dissolved away. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The reverse is true for weak acids. Most weak acids that textbooks discuss have weak (not strong) conjugate bases. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In effect, and behave as separate weak acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Chromium metal treated in this way readily dissolves in weak acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Typical weak electrolytes are weak acids and weak bases. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They also resist weak acids but are not recommended for use in environments that contain alkalis or inorganic acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Metal oxides, hydroxides, and especially alkoxides are basic, and counteranions of weak acids are weak bases. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since non-ionic species diffuse more readily through cell membranes, weak acids will have a higher absorption in the highly acidic stomach. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because butyllithium is a strong base, it quickly and quantitatively reacts with weak acids to give the corresponding lithium salts and butane. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Calcium dissolves with very weak acids and any increase in the ocean's acidity will be destructive for the calcareous organisms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Many pharmaceutical compounds are weak acids or weak bases. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is insoluble in water or weak acids, but soluble in sulfuric acid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Weak bases and weak acids are generally weak electrolytes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Legumin is soluble in water, and is soluble in very weak acids and alkalies; and it is not coagulated by heat. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Weak acids are excreted when the tubular fluid becomes too alkaline and this reduces passive reabsorption. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. While more resistant than limestone it is subject to attack by weak acids, and so performs poorly in outdoor environments subject to acid rain. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As above, sodium hydroxide reacts with weak acids such as hydrogen sulfide and mercaptans to give the non-volatile sodium salts which can be removed. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Then, the impurities are dissolved by weak acids; this converts alkaloid bases into salts that are washed away with water. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Hydrolyzable tannins are hydrolyzed by weak acids or weak bases to produce carbohydrate and phenolic acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With the exception of the quaternary ammonium cations, the organic ammonium cations are weak acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the stomach, drugs that are weak acids (such as aspirin) will be present mainly in their non-ionic form, and weak bases will be in their ionic form. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The rate of protonation is related to the acidity of the protonating species, in that protonation by weak acids is slower than protonation of the same base by strong acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Secondary phosphine chalcogenides are weak acids. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lactate might act as a weakacid to inhibit intracellular alkalization, resulting in the inhibition of capacitation. This weakacid forms a diester, it undergoes additions across the double bond, and it is an excellent dienophile. 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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