1mol K<sub>2</sub>CO<sub>3</sub>中含有2mol K<sup>+</sup>和1mol CO<sub>3</sub><sup>2-</sup>。
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A、CH<sub>3sub>COOH与水能以任意比混溶 B、CH<sub>3sub>COOH能与Na<sub>2sub>CO<sub>3sub>溶液反应,产生CO<sub>2sub>气体 C、1mol/L的CH<sub>3sub>COOH水溶液能使紫色石蕊试液变红 D、1mol/L的CH<sub>3sub>COONa溶液的PH约为9
A、2t<sub>1/2sub>=t<sub>1/2sub>’ B、t<sub>1/2sub>=2t<sub>1/2sub>’ C、t<sub>1/2sub>=t<sub>1/2sub>’ D、t<sub>1/2sub>=4t<sub>1/2sub>’
A、2t<sub>1/2sub>=t<sub>1/2sub>’ B、t<sub>1/2sub>=2t<sub>1/2sub>’ C、t<sub>1/2sub>=t<sub>1/2sub>’ D、t<sub>1/2sub>=4t<sub>1/2sub>’
A、I<sub>1sub>=½I<sub>2sub> B、I<sub>1sub>=I<sub>2sub> C、I<sub>1sub>=4I<sub>2sub> D、I<sub>1sub>=2I<sub>2sub>
A、I<sub>1sub>=½I<sub>2sub> B、I<sub>1sub>=I<sub>2sub> C、I<sub>1sub>=4I<sub>2sub> D、I<sub>1sub>=2I<sub>2sub>
A、CO<sub>2sub>含量上升,pH值升高,K+含量下降和水势下降 B、CO<sub>2sub>含量下降,pH值下降,K+含量上升和水势下降 C、CO<sub>2sub>含量上升,pH值下降,K+含量下降和水势提高 D、CO<sub>2sub>含量下降,pH值升高,K+含量上升和水势下降