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Write balanced equations for each step, and an overall equation, for the preparation of sodium peroxoborate hexahydrate from the reagents borax, $\ce{NaOH}$, and $\ce{H2O2}$.

Borax was added to a solution of $\ce{NaOH}$, then it was treated with $\ce{H2O2}$, then cooled to form a precipitate. Please help.

(No structures are necessary, simply the chemical formulas will suffice)

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Sodium peroxoborate can be prepare using two methods.

  1. Electrolysis of sodium borate with some sodium carbonate
  2. Oxidation of sodium meta borate using $\ce{H2O2}$

Heating borax strongly will give a mixture of sodium meta borate and boric anhydride.

If you can remove boric anhydride from the transparent glass like mixture, you can then add $\ce{H2O2}$

$$\ce{2NaBO2 + 2H2O2 + 6H2O -> Na2[(OH)2B(O - O)2B(OH)2].6H2O}$$

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