题目:
下列说法中正确的是( )
A.25℃时,pH=3的某酸溶液与pH=11的NaOH溶液等体积混合后,溶液pH≤7
B.将某电解质溶液加水稀释,溶液中离子浓度都减小
C.电解从海水得到的MgCl2溶液,可获得金属镁
D.pH=13的溶液中可以大量存在[Al(OH)4]-、HCO3、Na+、S2-
答案:
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