题目

写出下列反应的离子方程式 ⑴ NaHCO3溶液和NaOH溶液反应 ____________________________________ ⑵ NaHSO4溶液中滴加Ba(OH)2溶液至呈中性 ____________________________________ ⑶ 2NaClO3 +４HCl ═ ２ClＯ2 ＋Cl2↑＋２NaCl ＋２H2O 答案：⑴、  HCO3﹣+ OH﹣═   CO32﹣ + H2O ⑵、  Ba2++2OH﹣+2H++SO42﹣=BaSO4↓+2H2O ⑶、  2ClO3- +４H ++ 2 Cl- ═ ２ClＯ2 ＋Cl2↑＋２H2O实验顺序实验内容实验现象 ①A+B没有现象发生 ②B+D有气体放出 ③B+C有沉淀生成 ④A+D有沉淀生成It was the hurricane ________ was called Sandy ________ left at least 10 people dead and hundreds of thousands without power on the eastern coast of America. A．which; thatB．what; which C．which; who D．that; which