2022-2023学年龙岩市初三一检化学试卷-2651

化学试题参考答案第Ⅰ卷选择题3分，共30题号１２３４５６７８９10答案DADCBDCBCB第Ⅱ卷非选择题8小题，共70分）11.（8分）（1）金的化学性质稳定......................................................................................................2分（2）+3.....................................................................................................2分（3）①温度无法降低到柴草的着火点以下......................................................................................2分②炉火纯青（其他合理答案即可）......................................................................................2分12.（7分）（1）分子的结构不同......................................................................................................2分（2）密封放在阴凉处避光保存......................................................................................................2分（3）2H2OH2↑+H2O2..................................................................................................3分13.（9分）（1）CH4+2O2点燃2H2O+CO2.................................................................................................3分（2）795.6................................................................................................................2分（3）节约能源...........................................................................................2分（4）煤炭燃烧会污染环境（其它合理答案即可）...........................................................................2分14.（8分）（1）C+2CuO2Cu+CO2↑.......................................................................................................3分置换反应........................................................................................................1分（2）青铜........................................................................................................1分（3）金属光泽........................................................................................................1分（4）H2O.........................................................................................2分九年级化学答案第1页（共2页）15.（8分）（1）尿液（生活废水或人体汗液）...............................................................................................2分（2）CO2+4H22H2O+CH4.........................................................................................3分（3）电能......................................................................................................1分（4）CO2........................................................................................2分16.（12分）（1）2KMnO4K2MnO4+MnO2+O2↑.....................................................................................3分酒精灯........................................................................................................1分（2）控制反应速率........................................................................................................2分（3）导管口有气泡连续均匀冒出......................................................................................2分（4）实验一和实验二........................................................................................................2分（5）收集到的气体中混有水蒸气（或空气）....................................................................................2分17.（12分）（1）物理性质........................................................................................................1分（2）Fe+2HCl=FeCl2+H2↑.......................................................................................................3分（3）32......................................................................................................各1分（4）活性炭和氯化钠共同作用，加快铁生锈速率....................................................................2分（5）打开后铁粉等物质才会与空气接触......................................................................................2分（6）保证使用蒸汽眼罩时温度适宜（合理答案也可）..................................................................2分18.（6分）解：设理论上能得到铁华粉的质量为xFe+2CH3COOH=Fe(C2H3O2)2+H2↑561745.6Kgx....................................................................................................2分56∶174=5.6Kg∶x.............................................................