7.在标准压力和298 K时,已知纯水的电导率 _({H)_(2)O}=5.50times (10)^-6Scdot (m)^-1, 水的-|||-密度 (rho )_({H)_(2)O}=997.09kgcdot (m)^-3, _(m)^infty ((H)^+)=3.498times (10)^-2Scdot (m)^2cdot (mol)^-1 _(m)^infty ((OH)^-)=-|||-https:/img.zuoyebang.cc/zyb_442dcc5f37e6b5ce25cc666e5abcdcbb.jpg.980times (10)^-2Scdot (m)^2cdot (mol)^-1 计算纯水的解离度和离子活度积常数Ke。