Choose a pair of substances that can be used for standardization of 0,1 M solution of KMnO4:

Answer options

1. Na2C2O4, H2C2O4
2. K2CO3, CH3COOH
3. CH3COOK, H2C2O4
4. KHC2O4, HCOOH
5. Na2C2O4, CH3COOH

Correct answer

Na2C2O4, H2C2O4

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