Question

what will be formed when potassium reacts with cold water​

Answer 1

${ \huge{ \boxed {\color{white} {\fcolorbox {aqua}{black}{คຖŞຟēr }}}}}$

ᴡʜᴇɴ ᴘᴏᴛᴀssɪᴜᴍ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴄᴏʟᴅ ᴡᴀᴛᴇʀ ɪᴛ ᴡɪʟʟ ɢɪᴠᴇ ᴘᴏᴛᴀssɪᴜᴍ ʜʏᴅʀᴏxɪᴅᴇ ᴀɴᴅ ʜʏᴅʀᴏɢᴇɴ ᴀs ᴀ ᴘʀᴏᴅᴜᴄᴛ.

$\sf \implies2K + 2H_2O \rightarrow2KOH+H_2 \uparrow$

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Answer 2

H2(Hydrogen gas) and KOH(potassium hydroxide)

The solution turns phenolphthalein indicator pink due to presence of hydroxyl(OH-1) ions in it.

The potassium metal melts into a silvery globule and darts about the surface of the water producing a large amount of heat(exothermic reaction).

The heat produced may be high enough to light the hydrogen gas on fire if room temperature or warm water is used.

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