【简答题】NH 3 、 Cu 2+ 、 HCO 3 - 、 Cl - 四种分子和离子中: _____________ 既是 Br f nsted 酸又是 Br f nsted 碱;它们的共轭碱是 ___________ ; ___________ 既是 Lewis 碱又是 Br f nsted 碱; ___________ 是 Lewis 酸而不是 Br f nsted 酸; __________ 是 Br...
【单选题】Which of the following substance is not Brønsted acid ?
【单选题】'You are not here to tell me what to do. You are here to tell me why I have done what I have already decided to do,' Montagu Norman, the Bank of England's longest serving governor (1920-1944), is repu...
【单选题】电解质溶液中离子迁移数与离子电迁移率成正比,当温度与溶液浓度一定时,离子电迁移率是一定的,则25°C时,0.1mol.dm -3 NaOH中Na + 的迁移数t 1 与0.1mol.dm -3 NaCl溶液中Na + 的迁移数t 2 ,两者之间的关系为:
【简答题】在外电场存在下,0.05mol•kg -1 的LiCl溶液,Cl - 的离子迁移数为0.82,则Li + 的离子迁移数t(Li + )=()。
【单选题】电解质溶液中离子迁移数 t i 与离子电迁移率 u i 成正比。当温度与溶液浓度一定时,电迁移率是一定的,则 25 °C 时, 0.1 mol·dm -3 NaOH 中 Na+ 的迁移数 t1 与 0.1mol·dm -3 NaCl 溶液中 Na+ 的迁移数 t2 ,两者之间的关系为:
【简答题】布朗斯特(Brönsted)酸、碱和路易斯(Lewis)酸、碱的定义是什么?
【单选题】'You are not here to tell me what to do. You are here to tell me why I have done what I have already decided to do', Montagu Norman, the Bank of England's longest-serving governor (1920—1944), is repu...
【判断题】A Brønsted acid is a proton acceptor.