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CN -+ClO-+H2O=CNCl+2OH -(һ)CNCl+2OH-=CNO-+Cl-+H2O (��)

��һ��^��,��(һ)ʽ��ܿ�,��(��)ʽ��PHֵС��8.5�r,��ٶ��ጷų��CNCl��Σ�U,��ڵ�һ��^��ˮ��PHֵҪ��Ƶ�≥11,��

�ڶ��ǌ��һ��ɵ��}�Mһ��N2��CO2,��mȻһ��ɵ��}��Ժܵ�,��H��1%,��CNO-��ˮ��NH3��h(hu��n)��Ⱦ,��䷴��ԭ��飺

2NaCNO+3HOCl=2CO2+N2+2NaCl+HCl+H2O

��r��ԓ�ص�PHֵ��7.5~8֮�g,��PH≥8�r,��ٶ��;��PH̫�͕r��ˮ��ɰ�,��c��ж��Ȱ�,��

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2CrO42-+2H+Cr2O72-+H2O

Cr2O72-+2OH-CrO42-+H2O

��ʽ��Կ��ԗl��£��r�t��Ҫ�� Cr2O72-��ʽ��,��ډA�ԗl��t��CrO42-��ʽ��,��僺��t�Uˮ,��Ưϴ�Uˮһ��PH��5��,��(sh��)��CrO42-��ڣ��߀ԭ�rͨ��PH��ѿ��2.5~3֮�g,��䷴��ԭ��(߀ԭ�� Na2SO3��)�飺

2H2CrO4+3 Na2SO3+3H2SO4=Cr(SO4)3+3Na2SO4+5H2O

��c��Փ�Ϟ飺��c��r�t=4��1,��ˎ�rͶ�ϲ��^��,��t��Mˎ��,��Ҳ��[Cr2(OH)2SO3]2+��,��

߀ԭ��ďUˮֱ��ϏUˮ�غ��c��ϏUˮһ��̎��,��

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