Question

ʜᴇʟʟᴏ

ᴡɪᴛʜ ᴛʜᴇ ʜᴇʟᴩ ᴏꜰ ꜱᴜɪᴛᴀʙʟᴇ ᴇxᴀᴍᴩʟᴇꜱ.ᴇxᴩʟᴀɪɴ ʜᴏᴡ ᴍᴇᴛᴀʟꜱ ʀᴇᴀᴄᴛ ᴡɪᴛʜ ᴡᴀᴛᴇʀ.ɢɪᴠᴇ ᴇqᴜᴀᴛɪᴏɴ ꜰᴏʀ ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ.​

ɴᴏ ꜱᴩᴀᴍ ᴩʟᴇᴀꜱᴇ!​

Answer 1

Answer:

2Na + 2H20 ---→ 2NaOH + H2

Metals when react with water form their hydroxide.

Here sodium reacts with water and form Sodium hydroxide.

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Answer 2

Question:

With the help of suitable examples, explain how metals react with water. Give equation for the reaction.

Answer:

Metals react with water to displace hydrogen and sometimes to produce their hydroxide.

Equation-:

${\small {\underline {\boxed {\sf { Metal + Water \longrightarrow Metal \: Hydroxide \: or \: oxide + Hydrogen \: gas }} }}}$

Examples-:

Few chemical reactions of metals with water -:

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${\boxed {\sf{\green { 2Na + 2H_2O \longrightarrow 2NaOH + H_2 ↑ }}}}$

Sodium reacts with water to form sodium hydroxide and liberates hydrogen.

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${\boxed {\sf {\green { 2K + 2H_2O \longrightarrow 2KOH + H_2 ↑ } }}}$

Potassium reacts with water to form potassium hydroxide and liberates hydrogen.

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${\boxed {\sf {\green { Ca + 2H_2O \longrightarrow Ca(OH)_2 + H_2 ↑ }}}}$

Calcium reacts with water and forms calcium hydroxide and liberates hydrogen.

Points to remember:

• We know metals react with water to displace hydrogen.
• All metals don't react with water in same manner.
• Sodium and Potassium reacts with water violently.
• Iron reacts with water very slowly.
• Metals like gold and silver do not react at all.
• Metals like aluminum, zinc and iron do not react with cold or hot water. They react with steam but reaction is very slow.

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