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Chemistry 9 Online
OpenStudy (anonymous):

Write an equation to explain the pH of Na2CO3

OpenStudy (jfraser):

sodium carbonate is soluble in water, meaning it will dissolve and dissociate into its ions\[Na_2CO_3(aq) \rightarrow 2Na^{+1}(aq) + CO_3^{-2}(aq)\]the carbonate ion, being negative, will pull away some protons from water molecules, forming some hydroxide ions\[CO_3^{-2}(aq) + H-OH(l) \rightarrow HCO_3^{-1}(aq) + OH^{-1}(aq)\]

OpenStudy (jfraser):

since hydroxide ions are being formed, what's the pH of a solution of sodium carbonate?

OpenStudy (anonymous):

10.08

OpenStudy (jfraser):

even without a number, the pH will be basic because of the hydroxide ions

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