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1111121314151617PH1.81.9PH221pHI2223pH1050.51.0pHPH33132PH0.1%NaOHpH334101520253035404550/ml12465432121231233142%2123120.05mol/LCaCl2345CaCl230min2524h12431PHPH2123pHpH12pH3SDSSDS1500r/min0.9%10min232000r/min42341mL300mL20mmol/LPH7.012h