What is formed when zinc reacts with sodium hydroxide?
2022
What is formed when zinc reacts with sodium hydroxide?
Answer: B. Sodium zincate and hydrogen gas — Zinc (Zn) is an amphoteric metal, which means it reacts with both acids and bases. When zinc reacts with sodium hydroxide (NaOH), it forms sodium zincate and…
- A.
Zinc hydroxide and sodium
- B.
Sodium zincate and hydrogen gas
- C.
Sodium zinc oxide and hydrogen gas
- D.
Sodium zincate and water
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Correct answer: B
Zinc (Zn) is an amphoteric metal, which means it reacts with both acids and bases.
When zinc reacts with sodium hydroxide (NaOH), it forms sodium zincate and releases hydrogen gas.
Chemical Equation:
Zn+2NaOH→Na2ZnO2+H2↑
(Alternatively in aqueous solution:
Zn+2NaOH+2H2O→Na2[Zn(OH)4]+H2
Thus, the products formed are sodium zincate and hydrogen gas.