1.计算题- (共1题)

(1)根据图象,恰好完全反应时生成氢气的质量是_____g;
(2)写出锌与稀硫酸反应的化学方程式_____样品中锌的质量是_____g;
(3)稀硫酸的溶质质量分数是____。(写出计算过程)
2.科学探究题- (共1题)
(收集信息)(1)杂质不与稀盐酸反应 (2)氯化钙溶液显中性
(猜想)小聪认为废液的溶质中只含有CaCl2一种。
小明认为废液中的溶质有两种,它们是CaCl2和_____。(填化学式)
(实验)为了证明小聪和小明的观点谁正确,设计以下两种方案并进行实验,请参与其中,补全下表的填空。
实验操作 | 实验现象 | 实验结论 |
方案一:取少许废液置于试管中,向其中加少许酚酞试液 | 溶液_____色 | 小聪的观点正确 |
方案二:取少许废液置于试管中,向其中加入少量_____。 | 产生气泡 | 小明的观点正确 |
(结论)通过对实验现象分析,你认为_____的观点正确。
(反思)小明认为实验“方案一”不严密,不足以说明小聪观点正确,理由是_____。
3.简答题- (共1题)

(1)该浓盐酸的溶质是_____ (填化学式);
(2)现要配制3%的稀盐酸120g,需要这种浓盐酸_____ g;
(3)使用一段时间后,浓盐酸的溶质的质量分数小于36%,原因是_____;
(4)酸溶于水后能够解离出相同的阳离子_____ (用化学符号表示)。
4.单选题- (共8题)

A.生石灰和水 | B.镁和稀盐酸 |
C.硝酸铵和水 | D.氢氧化钠和水 |

A.t2℃时,a是饱和溶液,b是不饱和溶液 |
B.将两份溶液温度降到t1℃时,a、b中都有晶体析出 |
C.从a→b:先将a降温到t1℃,过滤后将滤液升温到t2℃ |
D.从b→a:在b中加入M至刚好饱和 |
A.用量筒量取水时仰视读数 |
B.配制溶液的烧杯用少量蒸馏水润洗 |
C.氯化钠晶体不纯 |
D.转移已配好的溶液时,有少量溶液溅出 |
A.滴入紫色石蕊溶液,颜色变红,则该溶液显酸性 |
B.滴入酚酞溶液,溶液保持无色,则该溶液显酸性 |
C.加入Mg粉,有气泡产生,则该溶液显酸性 |
D.加入CaCO3固体,有气泡产生,则该溶液显酸性 |
5.选择题- (共2题)
The four famous rock stars were due to arrive at any moment and a large crowd of young people had gathered at the airport to welcome them.The police found it difficult to keep the crowd under1after the plane landed and the performers appeared.They smiled and waved2at everybody.Dressed in pink shirts and light blue trousers,and with their long hair and their musical instruments3their shoulders,the four young men looked very much4.
In spite of the large number of policemen5,it was clear that the group would not be able to get to their waiting car6.Word had got out that they had written a new song which would be7when they performed at the grand hall that evening.They were now8with crying of “Play something! Play your new song!”
Even the police looked9when the young men unfolded their instruments and prepared to do one of their numbers as the10for getting out of the airport.The crowd settled down and listened to the first11of the new song. As soon as it was over,there was a great burst of applause and then everyone started12and shouting like crazy. Several young women fainted and had to be carried away by the13unit which was standing by.Greedy for more, the crowd14a repeat performance.Once again the performers gave in,but when the crowd requested still another song,the group cheerfully but firmly15.
Now closely surrounded by the police,they put away their16and stared towards their car which was some distance away.The crowd pushed forward,but the policemen,17arm in arm,prevented anyone from getting through. It took the singers a long time to reach their18.Finally,however,they got in and were just about to drive away when a young woman,who had19to get past the police,jumped onto the roof of the car.She shouted loudly as two policemen20her away and the car began moving slowly through the cheering crowd.
6.填空题- (共1题)
(1)胃液中可以帮助消化的酸的化学式为_____;
(2)浓硫酸敞口放置在空气中溶质的质量分数变小,是因为浓硫酸具有_____性;
(3)稀盐酸与稀硫酸化学性质相似,因为阳离子都是_____。
(4)用洗洁精洗油污,是利用了洗洁精的_____ 作用。
7.实验题- (共4题)

①B操作中应称量氯化钠的质量是_____ g
②D操作应选用_____mL的量筒(从10mL、50mL、100mL中选择);
③E操作的作用是_____。
她想通过实验确定铁和铜位置。现有铜丝、铁丝、稀盐酸、硫酸铜溶液四种物质。请你帮助李红同学完善下表中的探究方案。
实验操作 | 实验现象 |
方案1:分别取少量_____在试管里,分别插入_____、_____充分作用 | 铁丝表面有气泡产生 铜丝表面无明显现象 |
方案2:取少量硫酸铜溶液在试管中,插入铁丝,充分作用 | 现象_____ |
(1)结论:金属活动性_____
(2)将两张卡片贴回原位K Ca Na Mg Al Zn_____Sn Pb (H)_____Hg Ag Pt Au
(3)写出方案2中反应的化学方程式:_____。

(1)随着温度的升高其溶解度反而减小的是_____;(填“甲”、“乙”、“丙”);在_____℃时,甲与丙的溶解度相等。
(2)t3℃时,甲物质的饱和溶液中,溶质、溶剂、溶液的质量之比为_____。
(3)t3℃时往50g水中加入30g甲物质,溶液的状态是_____ (填”饱和”或”不饱和”),溶液的质量是_____
(4)t1℃时,甲、乙、丙三种物质的饱和溶液中,溶质质量分数的大小关系是_____(用“甲”、“乙”、“丙”及“>”、“<”或“=”表示)。
(5)在t3℃时,取等质量的甲、乙、丙三种物质的饱和溶液降温至t1℃时,甲、乙、丙三种物质溶液中,溶质质量分数的大小关系是_____(用“甲”、“乙”、“丙”及“>”、“<”或“=”表示)。
(6)若甲物质中混有少量的乙物质可以用_____进行提纯。
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【1】题量占比
计算题:(1道)
科学探究题:(1道)
简答题:(1道)
单选题:(8道)
选择题:(2道)
填空题:(1道)
实验题:(4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:10
7星难题:0
8星难题:6
9星难题:0