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Isocyanic acid (HNCO) can be prepared by heating sodium cyanate in the presence of solid oxalic acid according to the equation:

Isocyanic acid (HNCO) can be prepared by heating sodium cyanate in the presence of solid oxalic acid according to the equation:
2 NaOCN(s) + H2C2O4(s)  2 HNCO(l) + Na2C2O4(s)

Upon isolating pure HNCO(l), an aqueous solution of HNCO can be prepared by dissolving the liquid HNCO in water. What is the pH of a 100. mL solution of HNCO prepared from the reaction of 10.0g each of NaOCN and H2C2O4, assuming all of the HNCO produced is dissolved in solution? Ka of HNCO = 1.2  10-4.

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