Write the equations for all stages of the process of interaction of Sn with an aqueous solution of NaOH. Isolate the oxidant stage. The recovery process. Find the coefficients using the electronic balance method.
Tin is a metal that exhibits amphoteric properties, that is, it can react with both acids. and with alkalis.
In an alkali solution, the reaction proceeds as follows:
Sn + NaOH + H2O = Na2 [Sn (OH) 6 + H2
Sn – 4e = Sn4 + | 1reducer;
2H ++ 2e = H2 | 4 oxidizing agent
Let’s arrange the coefficients:
Sn + 2NaOH + 4H2O = Na2 [Sn (OH) 6] + 2H2
Oxygen test: 6 = 6
This reaction shows that the metal tin in an alkaline environment is not destroyed by corrosion. The protective film is formed by a complex compound of sodium hexa hydroxostannate salt.
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