5. When _______about one of the biggest concerns today, many people mention the sharp rise in prices. A. asking B. to ask C. having asked D. Asked 答案:D
25℃时,水的电离达到平衡:H2OH++OH- ΔH>0,下列叙述正确的是
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A.
向水中加入稀氨水,平衡逆向移动,c(OH-)降低
B.
向水中加入少量固体硫酸氢钠,c(H+)增大,KW不变
C.
向水中加入少量固体CH3COONa,平衡逆向移动,c(H+)降低
D.
将水加热,KW增大,pH不变