English Chemical

The Colligative Nature of Solution            Colligative nature of solution is a complementary property that depends on the amount of solute particles, and not on the type of solute. In everyday life we encounter many changes in the nature of the solution, whether caused by the type and concentration of the solute, the amount of solute particles or their conductivity. Included in the colligative nature of the solution is the decrease in vapor pressure, boiling point rise, decrease in freezing point, and osmotic pressure. In order to learn and understand the nature of a good solution kologative, it is necessary to review the concepts of solution. Various ways can be used to express the composition of the solution such as: 1.    Molarity The definition of molar or polarity denotes the number of moles of solute in each liter of solution. Therefore the unit of kemolaran (M) is mole L-1 or Molaritas. For example: 0.4 M solution CuSO4 means ...

LESSON PLAN Education Unit: High School Subject: Chemistry Class / Semester: X / Semester 2 Material: Compound Nomenclature and Reaction Equation Number of Meetings: 3 meetings A. Core Competency 1. Living and practicing the religious teachings that he embraces. 2. Living and practicing honest, disciplined, responsible, caring (peasant, cooperative, tolerant, peaceful) behavior, polite, responsive and pro-active and showing attitude as part of the solution to problems in interacting effectively with the social and natural environment and In placing themselves as a reflection of the nation in the association of the world. 3. Understand, apply, analyze factual, conceptual, procedural knowledge based on curiosity about science, technology, art, culture, and humanities with the insights of humanity, nationality, state and civilization related causes of phenomena and events, and apply procedural knowledge to A specific field of study according to his or her talents and...

           In chemistry, the chemical yield, the yield of the reaction, or only the rendement refers to the amount of reaction product produced in the chemical reaction. [1] Absolute rendement can be written as weight in grams or in moles (molar yield). The relative yield used as a calculation of the effectiveness of the procedure is calculated by dividing the amount of product obtained in moles by the theoretical yield in moles: Rendemen fractional = rendemen actual / theoretical rendemen To obtain a percentage yield, multiply the fractional yield by 100%.           One or more reactants in chemical reactions are often used redundantly. The theoretical rendement is calculated based on the number of moles of the limiting reagent. For this calculation, it is usually assumed that there is only one reaction involved. The ideal chemical yield value (theoretical rendement) is 100%, a value highly unlikely to be achieved in its p...

I.   Title       : Element identification II.  Purpose  : Examines the similarity of the properties of elements in the periodic table III. Theoretical basis The flame becomes characteristic of the elements. The sharp yellow flame color is a practical way to determine the element of sodium. This is why flame testing can be used to determine unknown solutions. The halide and alkaline and alkaline earth salts may react with a more oxidizing halogen, thus forming a halogen of the halide. The order of oxidizing forces is F2> Cl2> Br2> I2. F2 can oxidize Cl- to Cl2 and Cl2 can oxidize Br- to Br2 and so on. While Br2 can not oxidize Cl- to Cl2. The reaction can be seen as follows: Cl2 + Br- à Cl- + Br2             Cl2 + I- à Cl- + I2             Br2 + Cl- à does not react In this reaction to obtain chlorine can be made chlorine water by heating a mixture of MnO2 with HCl 6 M. The...

Chemical Equilibrium in Everyday Life    REACTION OF BALANCE OF OXYGEN CONDUCT IN THE BODY            In the body of a living being, there is oxygen. Oxygen is a very important substance for the life of living things. Oxygen by first being bound by blood, circulates throughout the body   through the circulation of the blood of living things. If oxygen stops circulating, the living thing will die. The oxygen in the blood will be bound by hemoglobin (Hb), according to thereaction equation: Hb + O2 ↔ HbO2 In the lungs, the reaction proceeds to the right because here there is a process of binding oxygen from the air. As in the network, the reaction goes to the left, the release of oxygen to be used for the combustion process. WATER BALANCE REACTION IN THE BODY          Every time our bodies always drain water; Through the skin (as sweat), lungs, kidneys, or through the digestive tract. The expenditure ...

Stoichiometry STOICHIOMETRY is a branch of chemistry that studies the quantitative relationship of the composition of chemicals and their reactions.       A.   BASIC LAWS OF CHEMICALS   LAW MASS LAW = LAVOISIER LA             "The mass of substances before and after the reaction is fixed". Example: Hydrogen + oxygen of       hydrogen oxide (4g)               (32g)                          (36g)           PERSONAL COMPARATIVE LAW = PROUST LEGAL             "The ratio of the mass of the elements in each compound is fixed" Example: A. In the compound NH3: mass N: mass H = 1 Ar. N: 3 Ar. H = 1 (14): 3 (1) = 14: 3 LEGAL COMPARATIVE LAW = LEGAL DA...

         Chemical reactions can happen anywhere around us, not just in the laboratory. Matter interacts to form new products through a process called chemical reactions or chemical changes. Every time we cook or are cleaning, it is also a chemical in action. Our bodies live and grow thanks to chemical reactions. There are reactions when we take drugs, light a match, and take a breath. Here are 10 examples of chemical reactions in everyday life. This is just a small example, because we see and experience hundreds of thousands or even more chemical reactions every day.   Photosynthesis                                                                                                           ...