1.流程题- (共1题)
(1) 请写出Mg(OH)2沉淀与试剂②发生反应的化学方程式：____________，基本反应类型为_________________；
(2)从海水中提取MgCl2时，经历了“MgCl2
Mg(OH)2MgCl2 ”的转化过程，这样做的目的是_____________ 。2.计算题- (共1题)
求：(1)充分反应后产生气体的质量为______________；
(2)原稀盐酸中溶质的质量分数为__________；
(3)锌粉中含锌的质量分数是____________？(写出计算过程，计算结果精确到0.1%)
3.科学探究题- (共1题)
【查阅资料】该气球充气原理是：通过挤破液体包，使液体与白色粉末接触产生二氧化碳气体，实现气球自动充气．
(1)为了检验气体是二氧化碳，可选用____(填试剂名称)，反应方程式为_______________。
探究一：液体包内溶液酸碱性的探究
(2)室温时，用pH试纸测得溶液的pH=3，则该溶液呈_____性。
探究二：白色粉末成分的探究
【猜想与假设】
甲同学认为是碳酸钙； 乙同学认为是碳酸钠； 丙同学认为是碳酸氢钠。
【设计并进行实验】
(3)将少量白色粉末放入水中搅拌，固体全部溶解，说明________同学的猜想不正确。
(4)室温时，分别向盛有碳酸氢钠、碳酸钠和白色粉末样品的锥形瓶中注入等体积、足量的10%盐酸(装置如图2)，记录如表：
| 实验编号 | 锥形瓶内物质 | 最终得到CO2体积/mL | |
| 名称 | 质量/g | ||
| ① | 碳酸氢钠 | 5 | V1 |
| ② | 碳酸钠 | 5 | V2 |
| ③ | 白色粉末 | x | V1 |
实验①的化学方程式为__________；表中x=_____；V1 ____V2(填“＞”、“＜”或“=”)。
【分析并得出结论】：
(5)白色粉末是_________。
4.简答题- (共1题)
(1)该浓盐酸中溶质与溶剂质量比为_______；
(2)使用一段时间后，浓盐酸的溶质质量分数小于36%，可能原因是_____________；
(3)盐酸等许多酸都能使紫色石蕊试液变红，是因为酸溶液中都含有______(用化学符号表示)。
5.单选题- (共13题)
| A．两份等质量、等质量分数双氧水在有、无MnO2的情况下产生氧气 |
| B．加水稀释浓盐酸 |
| C．向稀盐酸和氯化钙的混合溶液中加入碳酸钠溶液 |
| D．将足量粉末状的铁和镁分别与等质量、等质量分数的稀盐酸反应 |
| A．①变红，②③④不变红 |
| B．④比①先变红，②、③不变红 |
| C．①比④先变红，②、③不变红 |
| D．④变红，①②③不变红 |
| A．t1℃时，甲、乙两物质饱和溶液的溶质质量分数相等 |
| B．甲物质的溶解度大于乙物质的溶解度 |
| C．甲、乙两物质均属于难溶物质 |
| D．t2℃时，甲物质饱和溶液的溶质质量分数为50% |
| A．稀盐酸能与金属氧化物反应，可用于金属除锈 |
| B．固体氢氧化钠易潮解，可干燥氧气、二氧化碳等气体 |
| C．熟石灰可以用来改良酸性土壤 |
| D．碳酸钠溶液可以鉴别烧碱溶液和澄清石灰水 |
| A．能与二氧化碳反应 |
| B．能使无色酚酞试液变红 |
| C．能与稀硫酸反应 |
| D．能使紫色石蕊试液变红 |
6.选择题- (共3题)
My mother is a teacher. On weekdays, she gives lessons at school and on Saturdays she works in clubs. On Sundays, she is still busy.
On Sunday morning, mum gets up at six. She cooks breakfast for us first. And then it's time for cleaning. After that, she has breakfast with father and me. At 9, she goes to buy food for lunch in the supermarket. She can have a short rest after lunch. In the afternoon, mum doesn't go out. She helps me with my lessons. She does some reading, too.
Mother watches TV at about 7 when she finishes (完成) the housework. But at that time she is always tired and falls asleep (睡着) in the sofa sometimes.
My mother is a teacher. On weekdays, she gives lessons at school and on Saturdays she works in clubs. On Sundays, she is still busy.
On Sunday morning, mum gets up at six. She cooks breakfast for us first. And then it's time for cleaning. After that, she has breakfast with father and me. At 9, she goes to buy food for lunch in the supermarket. She can have a short rest after lunch. In the afternoon, mum doesn't go out. She helps me with my lessons. She does some reading, too.
Mother watches TV at about 7 when she finishes (完成) the housework. But at that time she is always tired and falls asleep (睡着) in the sofa sometimes.
7.填空题- (共2题)
(1)将某NaOH溶液逐滴滴入一定量的某硫酸中，如图所示的图像合理的是______(填“甲”或“乙”),写出该反应方程式___________，a点表示的意义为________。
(2)向长期敞口放置的NaOH溶液中滴加硫酸时，意外发现有气泡产生，请解释其原因_______________。
8.实验题- (共1题)
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【1】题量占比
流程题:(1道)
计算题:(1道)
科学探究题:(1道)
简答题:(1道)
单选题:(13道)
选择题:(3道)
填空题:(2道)
实验题:(1道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：16
7星难题：0
8星难题：4
9星难题：0