Explain why addition of HNO 3 to concentrated H 2 SO 4 results in the formation of and ions. How could one test experimentally to confirm that such ions exist in H2SO4 solution?
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【简答题】词汇运用:(10分) ★选择括号内单词的恰当形式填入空白处,使句意完整、正确。(5分) 小题1: Our class will __________(win/beat)the basketball . 小题2: –Sue was very_______ (quiet/active)at the party last night. –Yes, she sang and danced and...