Find a principle of common sense in chemistry, the principle of ordinary chemistry

I don't know what the equation is, but according to your story. Probably this is how it should be. The main ingredient of rice soup is starch, which is colorless.

The shell also contains iodine and is soluble in the wine. After that, a chemical reaction occurs when brushed on a white cloth, and the starch appears blue when it meets iodine, so it is displayed.

The principle should be that some substances will appear red when they are acidic and blue when they are alkaline. I don't know if that's what you're talking about. I don't understand the equation, it's been too long, and I forgot it.

Chromogenic reaction of starch with iodine.

Principle: color reaction between starch and iodine When the iodine solution is in contact with starch, the iodine molecule can enter the helix of the starch molecule, and an iodine molecule can be bound every six glucose units (each circle of the spiral) on average, and the entire amylose molecule can bind a large number of iodine molecules, which forms the starch-iodine complex blue.

However, at high temperatures, the molecular curl structure of starch is destroyed, and due to the strong thermal movement, it can no longer be combined with iodine with weak bonds, so it loses its original complex-like structure, so it shows its original true color.

Equation: I2+6N(C6H10O5)->2N(C18H30O5I).

The basic principles of chemistry are: conservation of energy, conservation of mass, rate of chemical reaction, chemical equilibrium, conservation of electrons gained and lost, and ionization equilibrium of chemical reactions.

A theory of the principle of chemical reactions.

1. Transition state theory.

It is believed that when a molecule reacts with a molecule, a non-completely elastic collision occurs between the molecules, which loses energy and causes bond breakage. And then the formation of free radicals, and the charged free radicals are combined with each other, (of course, including themselves and the same kind of combination), so there are several stages of chain initiation, chain growth, and chain attenuation on a macro scale.

2. Collision theory.

Collision theory, simple image, is also the mainstream response theory often introduced to students in secondary school basic education. Its essence is reactant A and reactant B, which prove to be stiff and collide directly, so that the electrons are transferred, either from A to B or from B to A.

Always in order to achieve a stable state, A and B must be chemically bonded. This theory is not suitable for calculation, and the quantification or quantification ability is poor, but the charge transfer and energy level transition of cutting-edge materials, substances, and drugs are often used by default to explain the reaction mechanism or the state of matter.

The principle of chemical reaction is the law and reason for the decomposition of molecules into atoms, and the rearrangement and combination of atoms to form new molecules. It refers to the specific way in which the reaction is experienced, also known as the reaction mechanism, which is used to judge whether the reaction can be carried out or change the reaction rate, mainly to decompose and recombine to form new substances.

The General Chemistry Principles course consists of six chapters, including chemical thermodynamics, aqueous solution chemistry, chemical kinetics, electrochemistry, structure and structure of matter, chemical equilibrium, chemical reaction rate, periodic table, etc.

The General Chemistry Principles course is a common basic course for university engineering majors, and it is also a basic course for the implementation of quality education in higher engineering education. Through the study of chemical thermodynamics, aqueous solution chemistry, chemical kinetics, electrochemistry, and structure of matter, Shenlu learners will understand the basic theories and frameworks of modern chemistry, and have the ability to use chemical theories, perspectives and methods to analyze and solve chemical problems involved in life, production and scientific research.

Principles of General Chemistry (3rd Edition) consists of 16 chapters, mainly including the state and structure of substances, chemical thermodynamics, chemical equilibrium, and chemical reaction rate.

Basic chemical principles such as the periodic law. The second edition of Principles of General Chemistry (3rd Edition) won the first prize of Excellent Textbook for Colleges and Universities of the State Education Commission in 1995 and has been reprinted 10 times. In 2002, it was selected as the national planning textbook of the "Tenth Five-Year Plan" for general higher education.

Based on the principle of combining inheritance and updating, the revision of the third edition reflects the following principles: (1) Explain in simple terms: basic principles such as chemical thermodynamics and structure of matter are the core content of the course, but they also involve more physical and mathematical knowledge, and how to express them in simple terms is what the authors have devoted themselves to studying; (2) Continuing the past and opening up the future, we not only pay attention to the foundation of middle school, but also pay attention to the connection with the follow-up courses, and some contents are typeset in small characters or page notes, taking into account the difference between the systematization of the narrative and the level of requirements, hoping that readers will realize that "learning and then knowing is insufficient"; (3) Pay attention to experiments and historical facts: introduce necessary experimental phenomena and data, and introduce the generation and evolution of some concepts with reference to the historical development process, so that readers can initially understand the relativity and limitations of human understanding of nature, so as to facilitate the cultivation of scientific thinking and innovative spirit. In accordance with the reform of the curriculum, two new chapters have been added to the third edition: Elemental Chemistry and Chemistry and Social Development.

It is hoped that readers can understand the basic knowledge of elements from the perspective of chemical principles, and based on the role and status of chemistry in social development, understand the richness and diversity of chemistry disciplines, and stimulate their interest in learning.

Principles of General Chemistry (4th Edition) is edited by Hua Tongwen, Wang Yingxia, Bian Jiang and Chen Jingzu, and Peking University Press.

Published in 2003, the "Eleventh Five-Year Plan" national planning textbook for general higher education.

The corresponding course of this book is the basic course of chemistry in the School of Chemistry of Peking University. The contents of the book mainly include: the state and structure of matter, the thermodynamics of chemical clearing, chemical equilibrium, the rate of chemical reactions, and the periodic table.

and other basic chemical principles. The second edition of this book won the first prize of the 1995 State Education Commission's Excellent Textbook for Colleges and Universities, and the third edition won the National Planning Textbook for the Tenth Five-Year Plan for General Higher Education and Early Education.

The basic principle of chemistry is: the energy of a chemical reaction is conserved.

Conservation of mass, rate of chemical reaction, chemical equilibrium, conservation of gain and loss electrons, and ionization equilibrium, etc.

Magnets are repelled like each other, collide with each other and split, and disperse.

1. Pressure.

1. Conversion relationship between units:

2. Expression of pressure.

1) Absolute: The actual value of the pressure based on the absolute vacuum is called absolute pressure (referred to as absolute pressure), which is the real pressure of the fluid.

2) Gauge pressure: The pressure measured from the pressure gauge reflects the value of the pressure inside the gauge that is higher than the atmospheric pressure outside the gauge.

Gauge pressure = absolute pressure - atmospheric pressure.

3) Vacuum: The pressure measured from the vacuum gauge reflects how much the pressure inside the gauge is lower than the atmospheric pressure outside the gauge.

It is not the former because of the metathesis reaction that occurs due to the difference in volatility.

The latter is different because of the boiling point.

Difficult volatile acids to make volatile acids.

Chemistry in life.