NO_2^(-) , F^(-) , H^(-) , CH_3COO^(-) like weak acid's strength of their conjugate base is more than water or less than water ?

NO_2^(-) , F^(-) , H^(-) , CH_3COO^(-) like weak acid's strength of th

1.	NO_2^(-) , F^(-) , H^(-) , CH_3COO^(-) like weak acid's strength of their conjugate base is more than water or less than water ?
Answer» Solution :All these are STRONGER BASE than water as these all are CONJUGATE base of WEAK acid.