Thermodynamic analysis of the decomposition of scheelite by oxalic acid.

RSC Adv · 2026 · PMC13010343 · PMID 41884370

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an increasing trendno p-value reported

According to equation (V), the gradual dissociation of H 2 C 2 O 4 with rising pH gives rise to an increasing trend for HC 2 O 4 − .

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a decreasing trendno p-value reported

As pH increases, Ca 2+ gradually combines with OH − to form Ca(OH) 2(aq) and CaOH + , so the Ca 2+ concentration exhibits a decreasing trend.

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