化学元素周期表第一主族：锂、钠、钾、铷、铯、钫它们金属性很强，所以形成的氢氧化物均为强碱。故氢氧化钾、氢氧化铷、氢氧化钠、都是强碱
The first main group of the periodic table of chemical elements: lithium, sodium, potassium, rubidium, cesium and francium. They have strong metallicity, so the hydroxides formed are strong bases. Therefore, potassium hydroxide, rubidium hydroxide and sodium hydroxide are strong bases
KOH是强碱吗
Is KOH a strong base
比NaOH还强
Stronger than NaOH
KOH是强碱？强碱还是弱碱与水的多少有关吗？化学性质与浓度有关吗
Koh is a strong base? Is strong alkali or weak alkali related to the amount of water? Are chemical properties related to concentration
KOH是强碱，所谓强碱、弱碱是相对而言，—-碱溶于水能发生完全电离的，属于强碱。活泼的金属对应的碱一般是强碱。强碱，弱碱当然与溶度无关。化学性质是物质在化学变化中表现出来的性质。如所属物质类别的化学通性：酸性、碱性、氧化性、还原性、热稳定性及一些其它特性。物质在发生化学变化时才表现出来的性质叫做化学性质。如：可燃性、稳定性、酸性、碱性、氧化性、还原性等、

Koh is a strong base. The so-called strong base and weak base are relatively strong bases, which can be completely ionized when dissolved in water. The alkali corresponding to the active metal is generally a strong alkali. Strong base, weak base, of course, has nothing to do with solubility. Chemical properties are the properties of substances in chemical changes. For example, the chemical generality of the substance category: acidity, alkalinity, oxidation, reducibility, thermal stability and some other characteristics. The properties of a substance that appear only when chemical changes occur are called chemical properties. Such as flammability, stability, acidity, alkalinity, oxidizability, reducibility, etc
氢氧化钾是一种强碱，性质与氢氧化钠相似，小强等同学决定对氢氧化钾的性质进行探究．（1）溶解性：将一
Potassium hydroxide is a strong base with properties similar to sodium hydroxide. Xiaoqiang and other students decided to explore the properties of potassium hydroxide. (1) solubility: put a
（1）将一药匙氢氧化钾投入装有80℃的热水中，热水立即沸腾起来．说明氢氧化钾易溶于水，且溶解时会放出大量的热，使溶液的温度升高达到沸点而沸腾；故填：极易溶于水，且放出大量的热；【分析】（1）因为开始时滴加氢氧化钾溶液酚酞试液变成红色，说明没有变质，若酚酞变质后，滴入氢氧化钾溶液，溶液开始就不会变红色；故填：酚酞变质后，滴入氢氧化钾溶液，溶液开始就不会变红色；（2）氢氧化钾是一种强碱，性质与氢氧化钠相似，因此碳酸钠溶液显碱性，则碳酸钾溶
(1) Put a spoonful of potassium hydroxide into hot water containing 80 ℃ and the hot water will boil immediately. It shows that potassium hydroxide is easily soluble in water and will release a lot of heat when dissolved, so that the temperature of the solution will rise to the boiling point and boil; Therefore, it is very soluble in water and releases a lot of heat; [analysis] (1) because the phenolphthalein test solution turns red when dropping potassium hydroxide solution at the beginning, it indicates that it has not deteriorated. If the phenolphthalein is deteriorated and dropping potassium hydroxide solution, the solution will not turn red at the beginning; So fill in: after phenolphthalein is deteriorated, drop potassium hydroxide solution, and the solution will not turn red at the beginning; (2) Potassium hydroxide is a strong base with similar properties to sodium hydroxide. Therefore, if the sodium carbonate solution is alkaline, the potassium carbonate will dissolve
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