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# What is the pH of Sodium Carbonate (${\mathrm{Na}}_{2}{\mathrm{CO}}_{3}$)?

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## Part 1: pHThe pH of any solution is defined as the negative log of Hydrogen ion concentration.Mathematically, $\mathrm{pH}=-{\mathrm{log}}_{10}\left[{\mathrm{H}}^{+}\right]$ pH is used to determine the nature of the solution whether it is acidic, basic, or neutral.SolutionpH rangeAcidic1 - 6.9Neutral7Basic7.1 - 14Part 2: Identifying the pH of the Sodium carbonateThe corresponding acid and base of salt can be produced by the hydrolysis of salt.The hydrolysis reaction can be represented as:$\underset{\mathrm{Sodium}\mathrm{carbonate}}{{\mathrm{Na}}_{2}{\mathrm{CO}}_{3}\left(\mathrm{s}\right)}+2\underset{\mathrm{Water}}{{\mathrm{H}}_{2}\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Carbonic}\mathrm{acid}}{{\mathrm{H}}_{2}{\mathrm{CO}}_{3}\left(\mathrm{aq}\right)}+\underset{\mathrm{Sodium}\mathrm{hydroxide}}{2\mathrm{NaOH}\left(\mathrm{aq}\right)}$Therefore, Sodium carbonate is a basic salt that is formed by the neutralization of a weak hydrochloric acid by a strong base Sodiium hydroxide.Hence, the pH of Sodium carbonate lies in the slightly basic range.Hence, pH value of Sodium carbonate lies in the range of 10 to 11.

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