Chemistry

Question

may be used as a primary standard.

OA. Anhydrous sodium carbonaate

OB. Concentrated sulphuric acid

O C. Hydrated sodium carbonate

OD. Anhydrous sodium hydroxide

Answer

A. Anhydrous sodium carbonate.

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Anhydrous sodium carbonate is a primary standard because it is a pure substance that can be obtained in a stable and reproducible form. It...