strugle for chemistry16

Understanding Chemical Reaction Chemical reaction is an event of chemical change from substances that react (reactants) to reaction products (products). In this chemical reaction is always produced new substances with new properties. This chemical reaction is written using elemental symbols. Characteristics of Chemical Reactions A chemical change or chemical reaction can be known through the accompanying symptoms. The symptoms or characteristics of chemical reactions include the following: 1. Color changes occur. 2. The occurrence of gas 3. Sludge occurs Deposition of the reaction results can be found in cooking tools. It can also be found in a water purification process that uses alum. 4. Temperature changes occur A temperature change can be observed when limestone is mixed with water. In addition you can also find a change in temperature in the reaction of carbide with water. Chemical Reactions To facilitate the conduct of a chemical reaction activity, then...

LESSON PLAN (RPP) School: SMA NEGERI I RONGGA Subject: CHEMICAL Class / Semester: XI / 1 Time Allocation: 3 X 45 MINS (1 X MEETING) A. Core Competence (KI) KI3: Understanding, applying, analyzing factual, conceptual, procedural knowledge based on curiosity about science, technology, art, culture, and humanities with the insight of humanity, nationality, state and civilization related causes of phenomena and events, and applying procedural knowledge to the field of study Which is specific to his or her talents and interests to solve problems. KI4: Processing, reasoning and chanting in the realm of concrete and abstract realms are linked to the development of the self-study in schools independently, and able to use methods according to scientific rules. Basic Competencies and Indicators   Basic competencies Indicator 3.5 Compare ionic bonds, covalent bonds, covalent coordination bonds, and metal bonds and their relation to the properties of subst...

RENDEMEN In chemistry,  yield , also referred to as  reaction yield , is the amount of product obtained in a chemical reaction. The absolute yield can be given as the weight in grams or in moles ( molar yield ). The  percentage yield  (or  fractional yield  or  relative yield ), which serves to measure the effectiveness of a synthetic procedure, is calculated by dividing the amount of the obtained desired product by the  theoretical yield  (the unit of measure for both must be the same): The theoretical yield is the amount predicted by a stoichiometry calculation based on the number of moles of all reactants present. This calculation assumes that only one reaction occurs and that the limiting reactant reacts completely. However the actual yield is very often smaller (the percent yield is less than 100%) for several reasons: 1.       Many reactions are incomplete and the reactants are ...