Potassium/ja: Difference between revisions

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==注意事項{{Anchor|Precautions}}==

==Precautions==

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金属カリウムは水と激しく反応し、KOHと[[hydrogen/ja|水素]]ガスを発生させる。

~~Potassium metal can react violently with water producing KOH and~~ [[hydrogen]] ~~gas.~~

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:{{chem2|2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g)↑}}

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[[File:Potassium water 20.theora.ogv|thumb|left|alt=カリウムの金属片を水の入った透明な容器に落とすと、ピンク色や薄紫色の鮮やかな炎で短時間燃え続け、最後にポンと水しぶきを上げる。|金属カリウムと水の反応。水素が発生し、カリウムの蒸気とともにピンク色または薄紫色の炎で燃える。溶液中で強アルカリ性の水酸化カリウムが生成する。]]

[[File:Potassium water 20.theora.ogv|thumb|left|alt=~~A piece of potassium metal is dropped into a clear container of water and skates around, burning with a bright pinkish or lilac flame for a short time until finishing with a pop and splash.~~|~~A reaction of potassium metal with water. Hydrogen is produced, and with potassium vapor, burns with a pink or lilac flame. Strongly alkaline potassium hydroxide is formed in solution.~~]]

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+金属カリウムは水と激しく反応し、KOHと[[hydrogen/ja|水素]]ガスを発生させる。
-Potassium metal can react violently with water producing KOH and [[hydrogen]] gas.
-</div>
-<div lang="en" dir="ltr" class="mw-content-ltr">
 :{{chem2|2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g)↑}}
-</div>
-<div lang="en" dir="ltr" class="mw-content-ltr">
+[[File:Potassium water 20.theora.ogv|thumb|left|alt=カリウムの金属片を水の入った透明な容器に落とすと、ピンク色や薄紫色の鮮やかな炎で短時間燃え続け、最後にポンと水しぶきを上げる。|金属カリウムと水の反応。水素が発生し、カリウムの蒸気とともにピンク色または薄紫色の炎で燃える。溶液中で強アルカリ性の水酸化カリウムが生成する。]]
-[[File:Potassium water 20.theora.ogv|thumb|left|alt=A piece of potassium metal is dropped into a clear container of water and skates around, burning with a bright pinkish or lilac flame for a short time until finishing with a pop and splash.|A reaction of potassium metal with water. Hydrogen is produced, and with potassium vapor, burns with a pink or lilac flame. Strongly alkaline potassium hydroxide is formed in solution.]]
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 <div lang="en" dir="ltr" class="mw-content-ltr">