氫氧化鉀是強堿，具強堿性及腐蝕性。其性質與燒堿相似，可以與酸反應生成鹽和水，也可與石蕊試液變藍、酚酞試液變紅，也可與兩性氧化物、兩性金屬等反應。下面具體介紹下氫氧化鉀的各種化學性質。

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、與酸反應

1. Reaction with acid

如與鹽酸、硫酸、硝酸反應。

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

KOH+HCl=KCl+H?O

KOH+HCl=KCl+H?O

2KOH+H?SO?=K?SO?+2H?O

2KOH+H?SO?=K?SO?+2H?O

KOH+HNO?=KNO?+H?O

KOH+HNO?=KNO?+H?O

2、顏色反應

2. Color reaction

可使石蕊試液變藍、酚酞試液變紅。

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

3、與兩性氧化物反應

3. Reaction with amphoteric oxides

如與氧化鋁反應。

Such as reaction with alumina.

Al?O?+2KOH=2KAlO?+H?O

Al?O?+2KOH=2KAlO?+H?O

4、與酸性氧化物反應

4. Reaction with acid oxide

如與二氧化碳、二氧化硫反應。

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

2KOH+CO?=K?CO?+H?O

2KOH+CO?=K?CO?+H?O

2KOH+SO?=K?SO?+H?O

2KOH+SO?=K?SO?+H?O

5、與兩性金屬反應

5. Reaction with amphoteric metals

如與鋁反應。

If it reacts with aluminum.

2Al+2KOH+2H?O=2KAlO?+3H?↑

2Al+2KOH+2H?O=2KAlO?+3H?↑

6、與兩性氫氧化物反應

6. Reaction with amphoteric hydroxide

如與氫氧化鋁反應

Such as reaction with aluminum hydroxide

Al(OH)?+KOH=KAlO?+2H?O

Al(OH)?+KOH=KAlO?+2H?O

7、相關化學反應

7. Related chemical reaction

2KOH+CuCl?=Cu(OH)?↓+2KCl

2KOH+CuCl?=Cu(OH)?↓+2KCl

CaO+H?O=Ca(OH)?

CaO+H?O=Ca(OH)?

Ca(OH)?+K?CO?=2KOH+CaCO?↓（由于KOH是強堿具有溶解蛋白質的性質，因此黑痣被除掉）

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

6KOH(s)+4O?(g)=4KO?（桔紅色）+2(KOH·H?O)+O?↑

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

4KOH(s)+4O?=4KO?+2H?O+O?↑

4KOH(s)+4O?=4KO?+2H?O+O?↑

6KOH+3S=△=2K2S+K2SO3+3H2O

6KOH+3S=△=2K2S+K2SO3+3H2O

2KOH+SO?=K?SO?+H?O18:16 2022/6/29

2KOH+SO?=K?SO?+H?O18:16 2022/6/29

KOH+CO?=KHCO?（氫氧化鉀變質該反應還是生產重要化工原料K?CO?的主要手段）

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

2KOH+H?S=K?S+2H?O

2KOH+H?S=K?S+2H?O

3KOH+C?H?Cl?=C6H?Cl?+3KCl+3H?O（農藥666分解反應）

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

8、與過渡元素鹽溶液發生復分解反應

8. Double decomposition reaction with salt solution of transition elements

CuSO?+2KOH=Cu(OH)?↓+K?SO?

CuSO?+2KOH=Cu(OH)?↓+K?SO?

FeCl?+3KOH=Fe(OH)?↓+3KCl

FeCl?+3KOH=Fe(OH)?↓+3KCl

除此之外，氫氧化鉀還可以發生其他反應，如與白磷反應生成磷化氫氣體。

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

此外氫氧化鉀對組織有燒灼作用，可溶解蛋白質，形成堿性變性蛋白質。溶液或粉塵濺到皮膚上，尤其濺到黏膜，可產生軟痂。溶液濃度越高，溫度越高，作用越強。濺入眼內，不僅可損傷角膜，而且能使眼部深組織損傷。要小心，更多內容就來我們網站http://www.ileleli.cn咨詢吧！

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.ileleli.cn Consult!