However, an unexpected trend is shown in Fig. 7 for the samples reacted at T k = 45 °C; in fact, Na 2 CO 3 was the main phase up to 2 min of reaction, whereas the content of Na 2 CO 3 ·H 2 O sharply increased beyond that.
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Synthesis of Ca(OH)<sub>2</sub> and Na<sub>2</sub>CO<sub>3</sub> through anion exchange between CaCO<sub>3</sub> and NaOH: effect of reaction temperature.
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