题目

A feeling of excitement overcame me as I looked around the stadium. At 5:30 pm, two hours before game time, I walked into the locker room（更衣室）．My    1   of school, music and what I planned to do on Saturday night were    2   with the simple aim to beat the football team across the field from us tonight. Approaching my locker（衣物柜）, I noticed my teammates   3  ．Some rested on benches, staring up at the ceiling    4   it were a film of the opposing team’s play．Some seemed a bit more    5  , using the time to tell jokes．A few stared at the field,某强酸性溶液X可能含有Ba2+、Al3+、NH+4、Fe2+、Fe3+、CO2-3、SO2-3、SO2-4、Cl-、NO-2、NO-3中的一种或几种，取该溶液进行连续实验，实验过程如下：根据以上信息，回答下列问题：（1）上述离子中，溶液X中除H+外还肯定含有的离子是______，不能确定是否含有的离子（M）是______，若要确定该M（若不止一种，可任选一种）在溶液X中不存在，最可靠的化学方法是______．（2）沉淀I的化学式为______，气体F的电子式为______．（3）写出反应②的离子方程式：______．（4）通常可以利用KClO在一定条件下氧化G来制备一种新型、高效、多功能水处理剂K2FeO4．请写出制备过程中的离子方程式______．（5）假设测定A、F、I均为0.1mol，10mL X溶液中n（H+）=0.4mol，当沉淀C物质的量大于0.7mol时，溶液X中还一定含有______．