化學元素周期表主族：鋰、鈉、鉀、銣、銫、鈁它們金屬性很強，所以形成的氫氧化物均為強堿。故氫氧化鉀、氫氧化銣、氫氧化鈉、都是強堿

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是強堿嗎

Is KOH a strong base

比NaOH還強

Stronger than NaOH

KOH是強堿？強堿還是弱堿與水的多少有關嗎？化學性質與濃度有關嗎

Koh is a strong base? Is strong alkali or weak alkali related to the amount of water? Are chemical properties related to concentration

KOH是強堿，所謂強堿、弱堿是相對而言，----堿溶于水能發生完全電離的，屬于強堿。活潑的金屬對應的堿一般是強堿。強堿，弱堿當然與溶度無關。化學性質是物質在化學變化中表現出來的性質。如所屬物質類別的化學通性：酸性、堿性、氧化性、還原性、熱穩定性及一些其它特性。物質在發生化學變化時才表現出來的性質叫做化學性質。如：可燃性、穩定性、酸性、堿性、氧化性、還原性等、

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

氫氧化鉀是一種強堿，性質與氫氧化鈉相似，小強等同學決定對氫氧化鉀的性質進行探究．（1）溶解性：將一

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）將一藥匙氫氧化鉀投入裝有80℃的熱水中，熱水立即沸騰起來．說明氫氧化鉀易溶于水，且溶解時會放出大量的熱，使溶液的溫度升高達到沸點而沸騰；故填：極易溶于水，且放出大量的熱；【分析】（1）因為開始時滴加氫氧化鉀溶液酚酞試液變成紅色，說明沒有變質，若酚酞變質后，滴入氫氧化鉀溶液，溶液開始就不會變紅色；故填：酚酞變質后，滴入氫氧化鉀溶液，溶液開始就不會變紅色；（2）氫氧化鉀是一種強堿，性質與氫氧化鈉相似，因此碳酸鈉溶液顯堿性，則碳酸鉀溶

(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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