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Solution: Oxalic acid (H2C2O4) is found in toxic concentrations in rhubarb leaves. The acid forms two ions, HC2O4− and C2O42−, by the sequential loss of H + ions. Draw Lewis structures for the three species, and comment on the relative lengths and strengths of their carbon-oxygen bonds. The connections among the atoms are shown below with single bonds only.
Problem
Oxalic acid (H2C2O4) is found in toxic concentrations in rhubarb leaves. The acid forms two ions, HC2O4− and C2O42−, by the sequential loss of H + ions. Draw Lewis structures for the three species, and comment on the relative lengths and strengths of their carbon-oxygen bonds. The connections among the atoms are shown below with single bonds only.
Additional Practice Problems
Bond Energy