Citric acid, being tribasic, forms either acid monometallic, acid dimetallic or neutral trimetallic salts; thus, mono-, diand tri-potassium and sodium citrates are known. [Please select]
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An example of a tribasic acid is phosphoric acid, H_{3}PO_{4}, and here we may have three different classes of salts of three various degrees of basicity or base-saturation. [Please select]
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These give the tribasic phosphate of lime, which results from the application of sulphuric acid to the nodules, a tendency to "go back" to the insoluble condition. [Please select]
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