1.计算题- (共1题)
(1)碳酸钠样品中碳酸钠的质量______________
(2)反应后所得溶液中溶质的质量分数。(结果精确到0.1%)_____________
2.科学探究题- (共1题)
问题。

(已知资料)
①SiO2不溶于水、且不与酸反应 ②K12、甘油、香精等均易溶于水
(实验探究)
Ⅰ:取一小段牙膏,加入蒸馏水,充分搅拌后静置,测得上层清液的pH为8.3,则此牙膏显 性。
Ⅱ:兴趣小组同学设计了如下实验方案,并进行3次实验。通过测量SiO2质量,从而确定此牙膏中SiO2的质量分数。实验过程如下:
①准确称取2.0g牙膏膏体,加足量水充分溶解并过滤。
②将滤渣转移至烧杯中,加入过量稀盐酸,至看到 为止。
③______、洗涤、干燥并称量得到剩余固体质量。(如表)
实验编号 | 1 | 2 | 3 |
实验前(g) | 2.00 | 2.00 | 2.00 |
实验后(g) | 0.43 | 0.44 | 0.45 |
④根据实验数据进行计算,此牙膏中SiO2
的质量分数为 %。
⑤反思实验过程。
A.步骤①中加足量水的目的是 。 |
B.步骤②中发生反应的化学方程式为 。 |
C.多次测量实验数据的目的是 。 |
D.若验证步骤②中盐酸过量,可以选择的试剂是 (至少写出类别不同的两种物质)。 |
3.单选题- (共16题)
A.“氮5”是一种固体 | B.“氮5”是一种单质 |
C.“氮5”由5个氮原子构成 | D.“氮5”具有可燃性 |

A.图中能表示氢分子的是![]() |
B.化学反应前后元素化合价都不变 |
C.该反应中共涉及四种分子和三种原子 |
D.化学反应前后原子种类和个数均不变 |

A.白磷的量不足不会影响实验结论 |
B.将白磷改为木炭也能得到正确的实验结论 |
C.试管内压强的减小会导致试管内液面降低 |
D.氮气不与白磷反应且难溶于水是设计该实验的依据之一 |

序号 | 试剂X | 试剂Y | 小烧杯中的现象 |
A | 水 | 硝酸铵 | 产生白色沉淀 |
B | 水 | 浓硫酸 | 无明显变化 |
C | 盐酸 | 碳酸钠 | 无明显变化 |
D | 稀硫酸 | 镁条 | 产生白色沉淀 |
A.A | B.B | C.C | D.D |
选项 | 实验名称 | 实验方案 |
A | 检验某固体物质中是否含有碳酸盐 | 取少量样品于试管中,滴加足量的稀盐酸,看到有气泡产生,则该固体物质中含有碳酸盐 |
B | 检验集气瓶中是否集满二氧化碳 | 将燃着的木条伸入集气瓶中燃着的木条熄灭集气瓶中已集满二氧化碳 |
C | 除去二氧化碳中混有的一氧化碳 | 将混合气体通过足量的澄清石灰水,澄清石灰水变浑浊,则得到一氧化碳 |
D | 鉴别碳酸钠和碳酸钙固体 | 分别取少量样品于试管中,依次滴加足量水,振荡试管,固体溶解的是碳酸钠,无明显变化的是碳酸钙。 |
A.A | B.B | C.C | D.D |
水质主要成分(mg/L)和酸碱度 |
偏硅酸:25-50 pH:6.5-8.5 锶:0.20-0.50 钾:3.0-4.8 钠:28-【小题1】钙:15-30 镁:8-18 |
A.该品牌矿泉水为混合物 |
B.该品牌的矿泉水一定呈酸性 |
C.“锶、钠、钙、镁、钾”属于金属元素 |
D.饮用该矿泉水可以为人体补充人体所需的无机盐 |
4.选择题- (共16题)
My mother has a unique way of embarrassing her children. Whenever she gets1about something, she jumps up and down, screaming. We2this as the “silly dances”. As her daughter, I find this3embarrassing. Anytime she goes into the silly dance, I will4slowly away, smile awkwardly, and5to people, “No, she's not my mother.”
Even though my mother brought me much6when I was little, and even though she7does the silly dance when something goes her way, I now8it. Because the silly dance shows just who she is, and it shows that she is happy.9she didn't do her dance and just obeyed our wishes for “not10, Mom”, she would compromise(妥协) who she is. I owe a lot of my 11for the theater to my mother. I now sing publicly like my mother does. And my friends are always doing that 12awkward smile and usually 13under their breath, “Carolyn, public.”
So in many ways I'm becoming my mother. I'm not going to 14 singing just because people feel embarrassed at it. I have no 15that I will embarrass my own children with my performance of the “silly dance”. So what? That's who I am.
It's my 16that everyone should dance to the beat of her own drum, even if the guy next to you gives you a(n)17look. I believe in the things that set us 18 I believe in being myself, no matter how many awkward smiles I 19. I believe in the idea that never 20 who I am.
How to Welcome Change in Your Life
Do you embrace(欣然接受) the road you are now on or resist and avoid change at all costs when a recent event has shaken you greatly? Here are things you can do in the midst of uncertainty to choose differently to change the track of your life.
Don't react.
What do we do when we don't know what to do? First, stop, take a deep breath and don't do anything.{#blank#}1{#/blank#} It is having faith and trusting what you do know in the unknown.
Reflect on the past.
Another activity is to recall times in your life when you were faced with an unknown. Then, think about how you handled the situation.{#blank#}2{#/blank#} Use your past experiences to bring you strength, and to remain you what you are capable of.
Make conscious decisions.
{#blank#}3{#/blank#} However, more possibilities open up when we are at peace. Go over your list of what ifs and make a more balanced list of the best and worst situations possible. Then talk to loved ones about what you would do in each situation and the choices you do have.
{#blank#}4{#/blank#}
We often see fears as our greatest enemy, yet they provide us with an enormous opportunity for self-growth. What if we were to see them as friends who want to help us become a better person? Let your fears help you instead of hurting you. Then, write down what comes to you.{#blank#}5{#/blank#}.
A. Don't panic.
B. Befriend your fears.
C. You may be surprised by the answers.
D. When we are fearful, our options seem limited.
E. Then try to feel at ease with the state of “not knowing”.
F. Learning from past failures helps you make better decisions.
G. Remembering these incidents will remind you that you've gone through difficult situations.


60%的同学的看法 | 1).靠自己打工来支付学费会影响学业; 2).现在把精力都用在学习上,将来报答父母的养育之恩; |
25%的同学的看法 | 1).通过打工可以获得工作经验,了解社会; 2).体会父母挣钱不易,从而戒掉乱花钱的坏习惯; |
15%的同学的看法 (包括你在内) | 觉得双方的观点都有一定的道理,但又不完全赞同; 我个人的看法是…… |
注意:1).文章的起始句已经给出;
2).词数100左右(不包括起始句);
参考词汇: 报答: repay 学费: tuition 经济独立: financially independent
Dear Editor,
I'm writing to tell you about a recent discussion our class have had on whether or not university students should be financially independent.
Yours,
Li Hua
A little old couple walked slowly into McDonald's one cold winter evening. They were so old that they looked out of place among the young families and young couples eating there that night.
Some of the customers looked admiringly at them. You could tell what the admirers were thinking. “Look, there is a couple who has been through a lot together, probably for 60 years or more!”
The little old man walked right up to the cash register (收银台), placed his order with no hesitation and then paid for their meal. The couple took a table near the back wall and started taking food off the tray (托盘). There was one hamburger, one order of French fries and one drink. The little old man unwrapped the plain hamburger and carefully cut it in half. He placed one half in front of his wife. Then he carefully counted out the French fries, divided them in two piles and neatly placed one pile in front of his wife. He took a sip of the drink, his wife took a sip and then set the cup down between them.
As the man began to eat his few bites of hamburger the crowd began to get restless. Again you could tell what they were thinking, “That poor old couple. All they can afford is one meal for the two of them.”
As the man began to eat his French fries one young man stood and came over to the old couple's table. He politely offered to buy another meal for the old couple to eat. The old man replied that they were just fine. They were used to sharing everything.
Then the crowd noticed that the little old lady hadn't eaten a bite. She just sat there watching her husband eat and occasionally taking turns sipping the drink.
Again the young man came over and begged them to let him buy them something to eat. This time the lady explained that, no, they were used to sharing everything together.
As the little old man finished eating and was wiping his face neatly with a napkin the young man could stand it no longer. Again he came over to their table and offered to buy some food.
After being politely refused again, he finally asked a question of the little old lady. “Ma'am, why aren't you eating? You said that you share everything. What is it that you are waiting for?”
She answered, “The teeth”.
As I held my father's hands one night, I couldn't help but notice their calluses (老茧) and roughness. His hands tell the story of his life as a1, including all his struggles.
One summer, I remember, a drought (旱灾) hit Ontario, turning it into a 2desert. On one of those hot mornings I was picking sweet com with my dad to fill the last3from the grocery store. Fifty dozen was all we needed, which4took twenty minutes. That morning, however, the process didn't 5quickly. After forty minutes of aimlessly walking in the field, we6 needed twenty dozen. I was completely frustrated (挫败的) and7. Dropping the basket heavily, I declared, “If the store wants its last twenty dozen, they can pick it themselves”. Dad8. “Just think, my little girl, only ten dozen left for each of us and then we're9.” Such is Dad----whatever problem he 10 he never gives up.
11 the bad effects of the drought were felt all over our county. It was a challenging time for everyone,12Dad remained optimistic (乐观的). He 13to be grateful for other things like good health and food on our plates. Only then did I truly begin to 14Dad and his faith that guided us through the hard times.
Dad is also a living example of real 15 From dawn to dusk, he works countless hours to 16our family. He always puts our happiness 17his own and never fails to cheer me on at my sports games 18his tiredness after long days. His loving and selfless nature has encouraged me to become more sympathetic (有同情心的) and19, putting others first.
Dad, the life 20I have learned from you will stay with me forever. You are my father, teacher, friend and, most importantly, my hero.
5.填空题- (共4题)
(1)洗涤剂能去除餐具上的油污,是因为它具有 功能。
(2)氯气(Cl2)常用作自来水消毒剂,其实验室制法为:MnO2+4HCl(浓)△ X+Cl2↑+2H2O,X的化学式为 。
(3)氧气和臭氧(O3)的化学性质有差异,是因为 (从微粒角度解释)。
(4)生石灰常用作食品干燥剂,其原因是 (用化学方程式表示)。
(5)石灰浆(主要成分为氢氧化钙)抹墙,干燥后墙面变硬的原因是______ (用化学
方程式表示)。
(1)地壳中含量最高的金属元素是 。
(2)用铜制电线主要是利用铜具有良好的延展性和 性。
(3)将生锈的铁片放入足量稀硫酸中,发生置换反应的化学方程式为 。
(4)在硫酸铜和硫酸亚铁的混合溶液中加入一定量的锌粉,充分反应后过滤,向滤渣中滴加稀硫酸,无气泡产生。则滤渣中的金属是 ,滤液中溶质的组成是 (写出所有可能)。
(5)将质量相等的锌粉和铁粉,分别放入两个烧杯中,再分别倒入质量相等、溶质的质
量分数相同的稀盐酸,充分反应,生成氢气的质量(m)随反应时间(t)变化的曲
线如图所示。下列说法正确的是 (填字母序号)。

|
(1)自来水厂对天然水进行净化的过程中,通常不采用 (填字母序号)。
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(2)水常用来配制各种溶液,硝酸钾溶液中的溶质为 。
(3)某同学进行以下实验:在甲乙烧杯中分别放入40g硝酸钾固体,
再分别加入100g冷水和热水,充分搅拌后(保持各自的温度不变),
结果如图所示。

①甲烧杯中溶液是 (填“饱和”或“不饱和”)溶液。
②将乙烧杯中的溶液降温到t1℃时,溶液恰好达到饱和状态,则t1℃时,硝酸钾
的溶解度是 g。
(4)已知:甲物质在20℃和40℃时的溶解度分别为30g和50g。下列有关甲物质的实验中说法正确的是 (填字母序号)。

a.只有A是不饱和溶液 b.B和E中溶质的质量分数相等
c.D中溶质的质量分数最大 d.将E再升温至 40℃时,会析出20g固体
(1)人们通过食物获取各种营养。
①水果和蔬菜富含的营养素主要有水和 。
②为了防止骨质疏松,人体每天必须摄入足够量的 元素。
(2)下列厨房用品所使用的主要材料,属于有机合成材料的是 (填字母序号)。

(3)人类以化石燃料为主要能源。
①天然气燃烧的化学方程式为 。
②下列做法有利于减少空气污染的是 (填字母序号)。
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6.实验题- (共3题)

(1)图一中看到的现象是 ,说明二氧化碳具有的性质是_______。
(2)小刚同学利用图二装置验证二氧化碳与氢氧化钠、氢氧化钙反应。
资料:通常状况下,1体积的水约能溶解1体积二氧化碳。
①甲中发生反应的化学方程式为 。
②小刚同学设计的实验方案是 。

(1)甲实验中发生反应的化学方程式为 ,该反应属于基本反应类型中的 反应。
(2)乙实验中,热水的作用是 ;通过对比 ,可证明可燃物燃烧需要与氧气接触。(3)丙实验中玻璃管内发生反应的化学方程式是 ,该装置的不足之处是______。
已知:碳酸钠溶液呈碱性。
(1)将适量A分别滴入盛有少量B、C、D、E的试管中,实验记录如下:
| B | C | D | E |
A | 无明显变化 | 液体变红色 | 无明显变化 | 白色沉淀 |
C中溶液是______,E中发生反应的化学方程式为______。
(2)再将适量B分别滴加到上述实验后盛有C、D、E的试管中,C中液体由红色变为无
色,D中无明显变化,E中沉淀消失。
①B中溶液是______,C中发生反应的化学方程式是______。
②盛有E的试管中最终所得溶液中一定含有的溶质是______。
(3)对还没有确定的液体,下列鉴别方法中,正确的是______(填字母序号)。
A.分别滴加适量水 | B.分别蒸发溶剂 |
C.分别滴加无色酚酞溶液 | D.分别通入CO2后,再滴加稀盐酸 |
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【1】题量占比
计算题:(1道)
科学探究题:(1道)
单选题:(16道)
选择题:(16道)
填空题:(4道)
实验题:(3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:4
5星难题:0
6星难题:13
7星难题:0
8星难题:5
9星难题:2