Download
1 / 27
270 likes | 599 Views
Trillium Learning Global 21st Century Schools Project. 化学交流 Chemistry Exchange: Experimental Methods & Questions. 云南师大附中 · 中国 化学教师：张毅 Chemistry Teacher: Tim Zhang Yunnan Normal University Affiliated High School Kunming, Yunnan Province, China.
E N D
Trillium Learning Global 21st Century Schools Project 化学交流 Chemistry Exchange: Experimental Methods & Questions 云南师大附中·中国 化学教师：张毅 Chemistry Teacher: Tim Zhang Yunnan Normal University Affiliated High School Kunming, Yunnan Province, China
伴随着期待和欣喜，我们迎来了宝贵的交流活动的机会。这次交流活动的意义，不仅仅在于我们在化学知识和学习上的相互启示；更深层的是，我们在不断地探索和发掘出更加科学的学习方式。我们在不断地改进着学习的方式，期待着全新的成效。伴随着期待和欣喜，我们迎来了宝贵的交流活动的机会。这次交流活动的意义，不仅仅在于我们在化学知识和学习上的相互启示；更深层的是，我们在不断地探索和发掘出更加科学的学习方式。我们在不断地改进着学习的方式，期待着全新的成效。 由传统到科学，由讲授到自主探究，由封闭到开放，改变给我们的学习带来全新的活力。 With the expectation and joy, we welcome the valuable opportunity of exchange. The significance of this exchange is not only in our chemistry knowledge of mutual inspiration and learning; more profound is that we continue to explore and discover a more scientific way of learning. We are constantly improving the way of learning, looking forward to new results. From the traditional to scientific, from infusing to self-exploration, from closed to open up – upgrade study brings us a new vitality.
在前不久我们刚刚学习了用容量瓶配制物质量浓度溶液的方法。在前不久我们刚刚学习了用容量瓶配制物质量浓度溶液的方法。 方法：a.用天平量取mgNaOH b.将NaOH倒入烧杯，加水溶解 c.待冷却，用玻璃棒引流倒入100mL容量瓶 We have recently learned a method – to formulate concentrated solutions of substances within a flask. Method: a. Use a scale to measure mgNaOH b. Pour NaOH into a beaker, dissolve it with water c. Cooling it, then drain into a 100mL flask with a glass rod
d.用水洗涤烧杯，并倒入容量瓶，在离刻度线1~2cm时改用胶头滴管滴加，至刻度线d.用水洗涤烧杯，并倒入容量瓶，在离刻度线1~2cm时改用胶头滴管滴加，至刻度线 e.装瓶贴标签 d. Wash the beaker with water and pour into the flask, when the liquid level at the 1~2cm from the mark, switch to a plastic-head dropper, single drops till reach the mark e. Label bottle
f.用量筒量取VmLHCl（37﹪） g.将HCl倒入烧杯，加水稀释 h.待冷却，用玻璃棒引流，倒入100mL容量瓶 i.用水洗涤烧杯，并倒入容量瓶，在离刻度线1~2cm时改用胶头滴管滴加，至刻度线 j.装瓶贴标签 f. Take VmLHCl (37%) with a cylinder g. Pour HCl into the beaker, dilute with water h. After cooling, drain into a 100mL flask with a glass rod i. Wash the beaker with water and pour into the flask, when the liquid level at the 1~2cm from the mark, switch to a plastic-head dropper, single drops till reaches the mark j. Label bottle
实验原理Principle： 我们经过上网查阅知道 化学变化通常附带着热能变化，在酸、碱溶液反应时表现为溶液温度升高。 Chemical reactions usually associate with thermal changes. In the acid, alkaline solution reaction time, the solution temperature is usually rising.
实验仪器及药品： 烧杯、玻璃棒、 50mL量筒、胶头滴管、温度传感器、 pH 传感器、足量浓HCl 、浓NaOH 溶液 Laboratory equipment and chemicals: beaker, glass rod, 50mL graduated cylinder, plastic-head dropper, temperature sensors, pH sensors, enough concentrated HCl, concentrated NaOH solution 目的： 配制 0.5mol 的盐酸及NaOH 溶液，并反应测量温度变化 Objective: preparing 0.5mol solution of hydrochloric acid and NaOH; make reaction and measure the temperature change
课题：探求配制物质的量的浓度溶液的新方法及研究酸、碱溶液反应时溶液温度变化情况 Topic: To explore a new method of formulating concentrated solutions of substances, and solution temperature changes in acid and alkaline solution reactions 指导教师：张毅 Instructor: Zhang Yi (Tim Zhang)
过程：a. 量取一定量的浓HCl 溶液 b.向浓HCl溶液里加入蒸馏水 c.在pH 接近0 .4时改用胶头滴管逐滴滴加 d.量取一定量的浓NaOH 溶液 Process: a. Measure certain amount of concentrated HCl b. Add distilled water into the concentrated HCl solution c. When the pH value approaches 0.4, use the plastic-head dropper d. Measure certain amount of concentrated NaOH solution
e.向浓NaOH 溶液里加入蒸馏水 f.在pH接近13.6 时改用胶头滴管逐滴滴加 g.量一定量的0.4molHCl倒入烧杯 h.量一定量的0.4molNaOH 缓缓加入盐酸中，并记录温度及pH变化 e. Add distilled water to the concentrated NaOH solution f. When the pH value approaches 13.6, switch to the first plastic-head dropper g. Measure certain amount of 0.4 mol HCl pouring into the beaker h. Measure certain amount of 0.4 mol NaOH slowly adding into hydrochloric acid and record the temperature and pH value changes
溶液配制 Solution preparation Formulate 0.4mol/L HCl, add distilled water to HCl（37﹪）
实验开始 Begin the Experiment Add HCl solution into NaOH, observe the temperature change
这次交流无疑是一个新的改变和探索。通过交流，我们将更全面地认识到我们目前学习的优劣，向国外教育吸纳更多的先进科学的学习方法，这将成为中外交流的一个突破口。目前，中外交流和知识的传输日益密切，高中生作为教育的重点，从高中学习文化交流沟通开始，相信对于未来交流发展带来极大的益处。 This exchange is undoubtedly a new change and exploration. Through communication, we will understand the merits of our current study, to obtain more advanced science education and learning methods from other countries, which will be a great breakthrough on globalizing our education. At present, foreign exchange and knowledge transfer have increased. High school education becomes a important focus. We believe that educational and cultural exchange begins from high schools, will bring great benefits toward future developments.
通过这次实验，我们学到了许多课本上没有的知识，在配置溶液的过程中，我们观察知道了pH的变化是很缓慢的。这次交流，我们懂得了团队合作的重要性。在这次合作中我们收获了知识与喜悦，但我们的合作仍存在着不足，分工和计划不够完善；下次的实验要有更完善的计划，更明确的分工，能更熟练的运用各种传感器。通过这次实验，我们学到了许多课本上没有的知识，在配置溶液的过程中，我们观察知道了pH的变化是很缓慢的。这次交流，我们懂得了团队合作的重要性。在这次合作中我们收获了知识与喜悦，但我们的合作仍存在着不足，分工和计划不够完善；下次的实验要有更完善的计划，更明确的分工，能更熟练的运用各种传感器。 Through this experiment, we learned a lot of knowledge that doesn’t exist in our textbooks. In the process of configuring the solution, we observed that the pH change is very slow.Doing this project, we understood the importance of teamwork. During the cooperation, we gained new knowledge and joy, but we still have shortcomings on collaboration. Work division and plan were not well. For the next project, we need better planning, clearer work division, and more skillful operating the various sensors.
这一活动也将标志着中外交流新时期的到来，我们不需走出国门进行繁琐的学习交流，充分利用网络资源，给我们建立了一个可以随时交流的平台，就学习、生活、人文风俗等相互了解，加强相互联系，促进和平共处，在交流中学到来自不同地域的精华。我们期待着以后更精彩的交流的到来。这一活动也将标志着中外交流新时期的到来，我们不需走出国门进行繁琐的学习交流，充分利用网络资源，给我们建立了一个可以随时交流的平台，就学习、生活、人文风俗等相互了解，加强相互联系，促进和平共处，在交流中学到来自不同地域的精华。我们期待着以后更精彩的交流的到来。 The project also marks the arrival of the new period of foreign exchange. We do not need to go abroad for tedious learning, by fully using network resources like the Trillium Learning exchange platform, we could learn about the different life, culture and customs at any time, gain mutual understanding, enhance mutual contact and promote peaceful coexistence. We could learn the essence of different regions through the exchange. We look forward to the wonderful exchange’s arrival in the near future.
我们想知道，在美国同学们是怎样学习化学的？我们想知道，在美国同学们是怎样学习化学的？ We would like to know how students in the United States learn Chemistry? 你们什么时候开始通过电子传感器学习？ When did you begin to learn using the electronic sensors? 你们学习些什么科目？ What subjects do you study in high school? 你们的学校生活是怎样的？ Describe your school life? 你们的社团活动是怎样开展的？ What club activities does your school have?
学校会不会开设当地特色课程或者活动学习？ Does your school have courses with localized content or field trip learning activities? 你们平时的作业是以什么形式完成的？ What forms are you usually allowed to use for doing homework? 你们经常进行此类交流活动吗？ Do you often conduct such exchange activities? 你们对中国文化有什么认识吗？ What is your understanding of Chinese culture? 你们一个星期上几节化学课？ How many Chemistry courses do you have weekly?
