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Definition of Na2HPO4
Na2HPO4, also known as Hydrogen Diphosphate or Dibasic Sodium Phosphate in English, is an inorganic chemical compound. This compound consists of 2 Sodium (Na) atoms, one Hydrogen (H) atom, one Phosphorus (P) atom, and four Oxygen (O) atoms. Its total atomic weight is about 141.96 g/mol. Its molecular structure includes 2 sodium ions, one hydrogen ion, and one phosphate ion. -
Properties of Na2HPO4
Na2HPO4 usually appears as white crystals or white powder, odorless and has a pH value around 8.9-9.2 when dissolved in water. In chemistry, Na2HPO4 can react with other compounds to form new substances through reactions such as reactions with acids, metals, or salts. -
Common chemical equations involving Na2HPO4
Reaction with acid:
Na2HPO4 + HCl -> NaH2PO4 + NaCl
Na2HPO4 + HNO3 -> NaH2PO4 + NaNO3
Reaction with metal:
Na2HPO4 + Ca -> Ca(HPO4)2 + 2Na
Reaction with salt:
Na2HPO4 + KCl -> K2HPO4 + NaCl -
Synthesis of Na2HPO4
Na2HPO4 can be synthesized in the lab through basic chemical reactions such as the reaction between NaOH and H3PO4:
2NaOH + H3PO4 -> Na2HPO4 + 2H2O
Additionally, it is also produced on an industrial scale through a synthesis process that includes steps such as dropping phosphoric acid into a solution of sodium hydroxide.