8.13 已知H2 SO4的二级解离平衡常数为 https:/img.zuoyebang.cc/zyb_1bcde4f5022640e57e69a4cb3f4f2f61.jpg.0times (10)^-2 ,则 .010molcdot (dm)^-3(H)_(2)S(O)_(4) 溶液的-|||-((H)^+) 为 __ cdot (dm)^-3 ,pH为 __