皮皮学，免费搜题
登录
搜题
【单选题】
已知 HF 的 K a =3.53×10 -4 , NH 3 ·H 2 O 的 K b =1.76×10 -5 ,由此可知 F - 与 NH 3 ·H 2 O 相比,其碱性:A.
比 NH 3 ·H 2 O 的强
B.
比 NH 3 ·H 2 O 的弱
C.
与 NH 3 ·H 2 O 的碱性相等
D.
条件不足，不能确定
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】水消解的目的与方法 目的: 破坏有机物,溶解悬浮物,将各价态的金属氧化成单一的高价态或转化成易于分离的无机物。 方法: (1) 湿式消解法:硝酸消解法、硝酸-高氯酸消解法、硝酸-硫酸消解法、硫酸-磷酸消解法、硫酸-高锰酸钾消解法、多元消解法、碱分解法 (2)干灰化法(高温分解法)
【简答题】Li Ming is presently studying English in New York. He has not been there long, and he is quite 1 at the great differences between American and Chinese cultures. For one thing, Americans and Chinese ar...
【单选题】What must you do if you use your telecard to make a local call?
A.
pay salary
B.
pay extra
C.
use a card phone
【简答题】根据所给词的适当形式填空。 1. How ________ (more) salt will you put in the dish? Only a little. 2. Tina__________(buy) some interesting souvenirs for kids on her trip to China. 3. I spent half an hour________ (mak...
【简答题】Learning about the American way of hospitality makes it possible for a guest to enjoy their stay with an American family. When invited, you can bring a gift as a small token of 1) ______________, thou...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
