题目 计算0.10mol/LNa2HPO4溶液的pH值。(H3PO4的Aa1=7.6G10-3;Aa2=6.3G10-8;Aa3=4.4G10-13) 相关知识点: 试题来源: 解析 答:c/Aa3<10Aw,c/Aa2>10,[H+]=[Aa2(Aa2+Aw)/c]1/2,带入数据得:[H+]=1.8G101、 故:pH=9.74 5.5 单选: 反馈 收藏 ...
摘要: An oral brush includes a) a body that includes a polymer composition that includes polypropylene and has a melt flow rate of at least about 10g/10 min, and b) bristles extending from the body.收藏 引用 批量引用 报错 分享 全部来源 求助全文 掌桥科研 ...