# How is oxalic acid prepared by:(i) laboratory method(ii) Industrially from sodium formate

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Hint: Oxalic acid can be prepared by various methods. It can be prepared in a laboratory, can be prepared from propylene, can be industrially prepared from sodium formate, and can be prepared through dimethyl oxalate process.

Complete answer step by step: Oxalic acid is an organic compound with a chemical formula ${C}_{2}{H}_{2}{O}_{4}$. It is a white crystalline solid which forms a colorless solution in water.
Now, let us look at the preparation of oxalic acid:
$\underset { Cane\quad Sugar }{ { C }_{ 12 }{ H }_{ 22 }{ O }_{ 11 } } \quad +\quad HN{ O }_{ 3 }\quad \xrightarrow [ { V }_{ 2 }{ O }_{ 5 } ]{ \quad } \quad \underset { Oxalic\quad acid }{ { (COOH) }_{ 2 } }$
$\underset { Sodium\quad formate }{ 2HCOONa } \quad \xrightarrow [ NaOH ]{ \quad } \quad { (COONa) }_{ 2 }\quad \xrightarrow [ Ca{ (OH) }_{ 2 } ]{ \quad } \quad Ca{ (OO) }_{ 2 }\quad \xrightarrow [ { H }_{ 2 }{ XO }_{ 4 } ]{ \quad } \quad \underset { Oxalic\quad Acid }{ { (COOH) }_{ 2 } }$