The beginning of the movie was boring, ______ the end was amazing! A. but B. and C. so D. or 答案:A
对0.2 mol·L-1碳酸钠溶液的微粒浓度分析正确的是
A.
[Na+]>[]>[OH-]>[HCO3-]>[H+]
B.
[Na+]+[H+]=[]+[HCO3-]+[OH-]
C.
[OH-]=[H+]+[HCO3-]+[H2CO3]
D.
[]+[HCO3-]+[H2CO3]=0.2 mol·L-1