Zn(s) + 2NaOH(aq) + 2H₂O(l) → Na₂[Zn(OH)₄](aq) + H₂(g)
Here's a breakdown of what happens:
* Zinc (Zn) reacts with sodium hydroxide (NaOH) in the presence of water (H₂O).
* Sodium zincate (Na₂[Zn(OH)₄]) is formed, which is a soluble complex ion.
* Hydrogen gas (H₂) is released as a byproduct.
Key points:
* Excess NaOH is crucial for this reaction to occur. If the amount of NaOH is limited, zinc oxide (ZnO) will be formed instead.
* Sodium zincate is a colorless solution.
* The reaction is exothermic, meaning it releases heat.
In summary, the reaction of excess sodium hydroxide with zinc produces sodium zincate and hydrogen gas.
