氢氧化钾是强碱，具强碱性及腐蚀性。其性质与烧碱相似，可以与酸反应生成盐和水，也可与石蕊试液变蓝、酚酞试液变红，也可与两性氧化物、两性金属等反应。下面具体介绍下氢氧化钾的各种化学性质。

Potassium hydroxide is a strong alkali with strong alkalinity and corrosivity. Its properties are similar to that of caustic soda. It can react with acid to produce salt and water, turn blue with litmus test solution, turn red with phenolphthalein test solution, and also react with amphoteric oxides and amphoteric metals. The following describes the chemical properties of potassium hydroxide.

1、与酸反应

1. Reaction with acid

如与盐酸、硫酸、硝酸反应。

For example, it reacts with hydrochloric acid, sulfuric acid and nitric acid.

KOH+HCl=KCl+H₂O

KOH+HCl=KCl+H₂O

2KOH+H₂SO₄=K₂SO₄+2H₂O

2KOH+H₂SO₄=K₂SO₄+2H₂O

KOH+HNO₃=KNO₃+H₂O

KOH+HNO₃=KNO₃+H₂O

2、颜色反应

2. Color reaction

可使石蕊试液变蓝、酚酞试液变红。

It can make litmus test solution turn blue and phenolphthalein test solution turn red.

3、与两性氧化物反应

3. Reaction with amphoteric oxides

如与氧化铝反应。

Such as reaction with alumina.

Al₂O₃+2KOH=2KAlO₂+H₂O

Al₂O₃+2KOH=2KAlO₂+H₂O

4、与酸性氧化物反应

4. Reaction with acid oxide

如与二氧化碳、二氧化硫反应。

For example, it reacts with carbon dioxide and sulfur dioxide.

2KOH+CO₂=K₂CO₃+H₂O

2KOH+CO₂=K₂CO₃+H₂O

2KOH+SO₂=K₂SO₃+H₂O

2KOH+SO₂=K₂SO₃+H₂O

5、与两性金属反应

5. Reaction with amphoteric metals

如与铝反应。

If it reacts with aluminum.

2Al+2KOH+2H₂O=2KAlO₂+3H₂↑

2Al+2KOH+2H₂O=2KAlO₂+3H₂↑

6、与两性氢氧化物反应

6. Reaction with amphoteric hydroxide

如与氢氧化铝反应

Such as reaction with aluminum hydroxide

Al(OH)₃+KOH=KAlO₂+2H₂O

Al(OH)₃+KOH=KAlO₂+2H₂O

7、相关化学反应

7. Related chemical reaction

2KOH+CuCl₂=Cu(OH)₂↓+2KCl

2KOH+CuCl₂=Cu(OH)₂↓+2KCl

CaO+H₂O=Ca(OH)₂

CaO+H₂O=Ca(OH)₂

Ca(OH)₂+K₂CO₃=2KOH+CaCO₃↓（由于KOH是强碱具有溶解蛋白质的性质，因此黑痣被除掉）

Ca (OH) Э +k Э Co ₃ =2koh+caco ₃↓ (because KOH is a strong base and has the property of dissolving protein, the nevus is removed)

6KOH(s)+4O₃(g)=4KO₃（桔红色）+2(KOH·H₂O)+O₂↑

6koh (s) +4o ₃ (g) =4ko ₃ (Orange) +2 (KOH · h Ω o) +o Ω ↑

4KOH(s)+4O₃=4KO₃+2H₂O+O₂↑

4KOH(s)+4O₃=4KO₃+2H₂O+O₂↑

6KOH+3S=△=2K2S+K2SO3+3H2O

6KOH+3S=△=2K2S+K2SO3+3H2O

2KOH+SO₂=K₂SO₃+H₂O18:16 2022/6/29

2KOH+SO₂=K₂SO₃+H₂O18:16 2022/6/29

KOH+CO₂=KHCO₃（氢氧化钾变质该反应还是生产重要化工原料K₂CO₃的主要手段）

Koh+co Ψ =khco ₃ (the reaction of potassium hydroxide modification is also the main means to produce important chemical raw material K Ψ Co ₃)

2KOH+H₂S=K₂S+2H₂O

2KOH+H₂S=K₂S+2H₂O

3KOH+C₆H₆Cl₆=C6H₃Cl₃+3KCl+3H₂O（农药666分解反应）

3koh+c ₆ h ₆ Cl ₆ =c6h ₃ Cl ₃ +3kcl+3h‹o (pesticide 666 decomposition reaction)

8、与过渡元素盐溶液发生复分解反应

8. Double decomposition reaction with salt solution of transition elements

CuSO₄+2KOH=Cu(OH)₂↓+K₂SO₄

CuSO₄+2KOH=Cu(OH)₂↓+K₂SO₄

FeCl₃+3KOH=Fe(OH)₃↓+3KCl

FeCl₃+3KOH=Fe(OH)₃↓+3KCl

除此之外，氢氧化钾还可以发生其他反应，如与白磷反应生成磷化氢气体。

In addition, potassium hydroxide can also react with white phosphorus to produce phosphine gas.

此外氢氧化钾对组织有烧灼作用，可溶解蛋白质，形成碱性变性蛋白质。溶液或粉尘溅到皮肤上，尤其溅到黏膜，可产生软痂。溶液浓度越高，温度越高，作用越强。溅入眼内，不仅可损伤角膜，而且能使眼部深组织损伤。要小心，更多内容就来我们网站http://www.jinhao360.com咨询吧！

In addition, potassium hydroxide can burn tissues, dissolve proteins and form alkaline denatured proteins. When the solution or dust splashes on the skin, especially on the mucous membrane, soft scabs can be produced. The higher the solution concentration, the higher the temperature, and the stronger the effect. Splashing into the eye can not only damage the cornea, but also damage the deep tissues of the eye. Be careful, come to our website for more information http://www.jinhao360.com Consult!