【单选题】25℃时醋酸的 ,当浓度为c时测得醋酸的 ,则浓度为c时醋酸的解离度为( )
【单选题】在下列实验方法中,不能证明醋酸是弱酸的是( )
B.
25℃时,0.1mol/L的醋酸的pH约为3
C.
25℃时,等体积的盐酸和醋酸,前者比后者的导电能力强
D.
25℃时,将pH=3的盐酸和醋酸稀释成pH=4的溶液,醋酸所需加入的水多
【单选题】Why is it not necessary for the man to take a taxi to the hotel? .
A.
Because there is an excellent bus service.
B.
Because there is an excellent railway service.
C.
Because there is an excellent subway system.
D.
Because taxi system there isn t convenient.
【单选题】欧氏(Osler)小结常见于以下哪些患者
【简答题】阅读理解 SGIVING in SPRING 2010 Frequently Asked Questions What is SGIVING? SGIVING is an exciting yearly where hundreds of New York City s gather together annually for a remarkable ...
【简答题】True or False (判断下列句子是否符合短文内容,符合的用'T'表示,不符合的用'F'表示):(7分) Richard is an exchange student from the USA. He is teaching his friends at Rose Garden School how to play Softball. He is explaining the rules....
【单选题】在下列实验方法中,不能证明醋酸是弱酸的是
B.
25 ℃时,0.1 mol·L -1 的醋酸的pH约为3
C.
25 ℃时,等体积的盐酸和醋酸,前者比后者的导电能力强
D.
25 ℃时,将pH=3的盐酸和醋酸稀释成pH=4的溶液,醋酸所需加入的水多