人妻精品蜜臀色欲av,亚洲男同志gay网站

本書在介紹實(shí)驗(yàn)室安全規(guī)則的基礎(chǔ)上安排了24個(gè)實(shí)驗(yàn)項(xiàng)目，以化學(xué)原理的驗(yàn)證性實(shí)驗(yàn)為主，另有兩個(gè)簡單的無機(jī)合成和有機(jī)合成實(shí)驗(yàn)，既可鍛煉學(xué)生的基本操作能力，也可加深理論與實(shí)踐之間的聯(lián)系。附錄有普通化學(xué)實(shí)驗(yàn)室常用儀器使用介紹。

Welcome to General Chemistry Lab! This textbook is to introduce the experimental methods and tools used in college chemistry laboratory. Practical work is the heart of chemistry and chemistry is so called an experimental science. This book contains in total twenty-four labs, which would allow you to practice some basic techniques and protocols that our chemists use to investigate the concepts and principles you’ve learnt in college chemistry courses. From these labs, you will learn chemistry from the practical aspects other than lectures. You will observe, measure, deduce and determine the identity, composition, structures, quality, quantity, physicochemical properties and finally, the formation of molecules, which are unique ways taken by chemistry. Each lab lasts approximately 2 hours except for Lab 21, which requires 4 hours’ laboratory time. Your lab captain would either arrange one lab per week or two labs in one laboratory session on alternative weeks. You are expected to go through the twenty-four labs in one academic year.
This lab textbook is designed for the non-chemistry majored students, especially the students in the college of engineering. Yes, just like you! The book contains all the information you need for a chemistry laboratory course, including a textbook and a lab report booklet. The textbook describes a lab safety policy, the manuals of the twenty-four labs, a brief introduction to glassware, equipment, and instruments you will be using in the laboratory and finally, a list of glassware that are in your bench cabinet. The manual for each lab includes an introduction to the chemistry knowledge/principle that the lab is based on, a list of chemicals and equipment you will use during experiments, a stepwise experimental protocol. In the lab report booklet, we provide a risk assessment form, a set of pre-lab questions, in-lab data notebook, data analysis and a post-lab discussion to each lab. You shall read through the textbook content of the lab when you are preparing for the lab, and then complete the risk assessment form and pre-lab questions in the lab report booklet before you start the experiment. During the lab session, you can record your observations and experimental data in the part of data notebook of report booklet. After you complete the lab session, you need to continue analyzing your data and the post-lab question will lead you to dig more deeply into the lab in terms of either experimental protocol or data analysis. You can detach the pages of the lab accordingly when you go to laboratory or turn in the report afterwards.
We wrote the book in such a pattern to suit the students from different academic background, such as non-English speaking environment, high schools with different curriculum in chemistry, especially practical part of chemistry. We prepare the book as a package of a textbook and a report booklet to make it easy for the students to use inside laboratory and to review the lab afterwards. We hope with the help of this lab book, the students would accomplish in the college chemistry lab regardless of their previous training.
Finally, we understand this could be the first time that you practice chemical experiments. We would like to help you prepare well for the lab sessions. We have prepared eighteen videos to demonstrate some of the experiments, instruments, and common glassware that you will be doing and using at laboratory. A QR code is placed next to the experimental step for a quick access to the corresponding video. Please feel free to watch the videos in advance by accessing the online or electrical materials of this book. Furthermore, in the teaching laboratory, our lab captains and teaching assistants are present all the time, whenever you have questions and/or help is needed. Do not hesitate to raise your hand and/or just shout “Help!”
Now you are ready to dive into the ocean of chemistry experiments. Enjoy, and more important, keep safe!

SHAO Fangwei
January 2023

你還可能感興趣

我要評(píng)論