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Zinc metal reacts with sodium hydroxide to produce ________.
zinc hydroxide
zinc oxide
sodium hydride
sodium zincate
sodium zincate
When zinc metal reacts with a strong base like sodium hydroxide (NaOH), it undergoes an oxidation-reduction reaction to form a soluble complex salt known as sodium zincate and releases hydrogen gas. This property of zinc demonstrates its amphoteric nature, as it reacts with both acids and bases.
When zinc metal reacts with a strong base like sodium hydroxide (NaOH), it undergoes an oxidation-reduction reaction to form a soluble complex salt known as sodium zincate and releases hydrogen gas. This property of zinc demonstrates its amphoteric nature, as it reacts with both acids and bases.
Think of this like a chameleon; just as a chameleon changes color to adapt to its surroundings, zinc acts like a metal reacting with acids, but also 'changes' to behave somewhat like a non-metal by reacting with strong bases.
Zin-Na-H: Zinc, Sodium hydroxide, Hydrogen (the products include the H2 gas indicator).
Zn+2NaOHтЖТNa2тАЛZnO2тАЛ+H2тАЛ тАФ Chemical equation for the reaction of Zinc with Sodium Hydroxide.
The reaction proceeds as zinc displaces hydrogen from the hydroxide ion or water in the presence of the strong base. The chemical equation is: Zn+2NaOHтЖТNa2тАЛZnO2тАЛ+H2тАЛтЖС. In this process, the zinc atom is oxidized from a 0 oxidation state to +2, and hydrogen is reduced from +1 to 0.
Zinc is an amphoteric metal, meaning it reacts with both strong acids and strong bases.
The reaction produces hydrogen gas, which can be identified by the 'pop' sound in a burning splinter test.
Sodium zincate (Na2тАЛZnO2тАЛ) is a water-soluble coordination compound.
Used in chemical synthesis to produce hydrogen gas in laboratory settings.
Requires handling of caustic substances like sodium hydroxide.
Laboratory preparation of hydrogen gas.
Industrial metal cleaning and surface treatment processes.
Sodium zincate is chemically represented as Na2тАЛ[Zn(OH)4тАЛ] in aqueous solution.
Option A (Zinc hydroxide) is an amphoteric hydroxide but not the product of this specific reaction.
Option B (Zinc oxide) is formed by heating zinc, not via reaction with NaOH in aqueous solution.
Option C (Sodium hydride) is an entirely different ionic compound (NaH) formed by reacting sodium with hydrogen gas.
D is correct тАФ Zinc metal reacts with aqueous sodium hydroxide to produce sodium zincate and hydrogen gas.
Always remember that amphoteric oxides/metals react with both bases and acids; common amphoteric elements include Al, Zn, Pb, and Sn.
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