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The Ka values for four acids are: H,CO3 4.5 x 10- HCOOH 1.8 x 104 H, C, H. OH(COO)3 7.1 x 104 HCN 6.2 x 10-10 The pH's of 0.50 mol/L solutions of these acids were measured and the acids were placed in order, from highest pl to lowest pl. The result was which of the following? O HCN, H, C, H, OH(COO);: HCOOH, H2CO} H2CO3, HCN, H, C, H, OH(COO),, HCOOH HCN, H,CO3, HCOOH, H, C, H, OH(COO); O H; C; H, OH(COO);; HCOOH, H,CO;, HCN