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1.1 ԇ��

        ��(li��n)�ױ��Һ(��),��Ș�(bi��o)��(zh��n)��ɫ��Һ,��0.00564 mol/L��c��(bi��o)��(zh��n)��Һ��5%�⻯��Һ,��pH=4��ᾏ�_Һ,��0.5%��Һ,��0.0282 mol/L��(bi��o)��(zh��n)��Һ,��

1.2 ��

        (1)��ɫ��ٱ��y��Ʒ�ض��˞�15��~20��,��ڴ˜ض�,��(y��ng)�Ȍ��Ʒ��ˮ��ʹ��ض��15��~20��,�ٜy��(sh��)ֵ��ʢ��5ml��Ʒ�ı�ɫ�܃�(n��i),�μ��(li��n)�ױ��Һ2~3��,��,��ی��Ʒ��ںڰ�̎,�o��15��犺�,�c��Ș�(bi��o)��(zh��n)��ɫ��Һ��^�y��,��Y(ji��)��Ʒ��Ⱥ��(��ɫ�r,�۾��Ĺܿ��»��ǰ��^��),��ȝ�Ⱥܸߕr,��a(ch��n)��Sɫ;��(d��ng)��Ʒ�A��^��Լ��ȝ�Ⱥ͕ܵr,��ܮa(ch��n)��{(l��n)�Gɫ��{(l��n)ɫ��˕r,��ټ��1ml(1+2)�}��1ml��(li��n)�ױ��Һ,��ɮa(ch��n)��ĵ��Sɫ,��M(j��n)�Мy��,��

        (2)��ζ��(��(bi��o)��(zh��n)��Һ��ζ��)��ˮ��С��10 mg/L�r,ȡ200ml��ˮ��ȶ��r,��(y��ng)��p��ˮ��w�e,��ڌ�200ml�ۘӼ��500 ml�F��ƿ��,��5~20ml 0.00mol/L��c��(bi��o)��(zh��n)��Һ,1ml 5%�⻯��Һ1 ml��ᾏ�_Һ,��1 ml��ҺʹpH��3.5~4.2֮�g��0.0282 mol/L��(bi��o)��(zh��n)��Һ�ε��@��{(l��n)ɫ��K�c(��{(l��n)ɫ��(y��ng)��ʧ),��1�ε�Һ��w�e(�s��0.05 ml)��x��(sh��)��ȥ,��200 ml��ˮ��1 ml 0.00564N��Һ�r,�ஔ(d��ng)�ڴ��1mg/L��,��5m�r,��5 mlԇ��;��10mg/L�r,��(y��ng)��10 mlԇ��ˮ��ȸ��ߕr,�Ͱ��ԇ��ζ��y�õ��Ȟ鿂��,��ʽӋ��:
        Cl2(mg/L)=[(A-5B)×200]/C
        ʽ��:Cl2-��(mg/L),��
                 A—0.00564 mol/L��c��(bi��o)��(zh��n)��Һ�Ĕ�(sh��),��
                 B—0.0282 mol/L��(bi��o)��(zh��n)��Һ��ml��(sh��)��
                 C—��ˮ��ml��(sh��),��

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