kimia

Assalamu’allaikum Wr. Wb My name is Siti Naslikah I from jambi university chemistry education I from a reguler standalone class My NIM is RRA1C116004 MATERIAL CLASSIFICATION today we will learn about material classification, the first element, the element is pure substance which can not be described into other simpler substances with ordinary chemical reactions, the element is the basic ingredient of the material. The second is a compound, the compound is a pure substance that can decompose through ordinary chemical reactions to form other simple substances. The compound is a combination of two or more elements present in a material, produced by a chemical reaction. The latter is a mixture, a mixture is a material composed of two or more substances with an irregular composition and still possessing the properties of the original substance. The mixture can be classified into heterogeneous mixtures and homogeneous mixtures. Examples of elements are metallic and nonmetallic eleme...

LESSON PLAN School Name: SMA ........... Subject: Chemistry Class / Semester: X / Two Main Material: Electrolyte and Non Electrolyte Solutions Time Allocation: 1 x 3 JP A. Core Competencies KI 1: Living and practicing the religious teachings it embraces KI 2: Living and practicing honest, disciplined, responsible, caring (polite, cooperative, tolerant, peaceful) behavior, courteous, responsive and pro-active and showing attitudes 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. KI 3: Understand, apply, analyze factual, conceptual, procedural knowledge based on his knowledge of science, technology, arts, culture and humanities with the insights of humanity, nationality, state and civilization on the causes of phenomena and events, and apply procedural knowledge to the field Specific studies according to talent and interest to solve pr...

The Dangers Of Chemical In Food Currently on the market there are still many additional hazardous food ingredients on a number of processed food products home industries and small industries. It happened because of lack of insight of entrepreneurs against food safety (food safety). Many examples of violations have occurred in the field, as a form of ignorance of the hidden danger risks behind the action. For example there is a salted fish trader who sprayed an insecticide (mosquito) to salted fish in his wares with the aim that his wares will not be caught by flies. Finally, the toxic substance is still attached to the mosquito fish. Practitioners at the Center for Drug and Food Control (BPOM) have several times found products such as syrup, noodles, tofu, meatballs containing chemicals that are harmful to human health, such as: harmful preservatives (benzoic, formalin, etc.), harmful pengenyal (Borax, etc.), harmful dyes (Rhodamin-B, Methanyl Yellow, etc.), artificial sweetene...

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. 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: 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 there is only one reaction involved. The ideal chemical yield value (theoretical rendement) is 100%, a value highly unlikely to be achieved in its practice. Calculate the percent of rendemen that is by using the following equations percent rendemen = weight yield / weight of yield divided b...

PRACTICAL TITLE TERMOKIMIA AND LEGAL HESS OBJECTIVES OF EXPERIMENT 1. Measuring the heat of reaction with a simple tool. 2. Collecting and analyzing thermochemical data. 3. Apply the Hess law. THEORETICAL BASIS Thermodynamics explains the relationship between heat and other forms of energy. Its development, which was an important scientific achievement in the 19th century, was due to the efforts of physicists and engineers who wanted to achieve high efficiency in a heat engine. The interest in improving the engine once again becomes important because of the need to use fossil fuels effectively. However, in the last 75 years, the important application of thermodynamics is in the field of chemistry. The law of thermodynamics is an important tool for studying chemical reactions. Thermochemistry is the influence of the heat that accompanies the chemical reaction. The second law of thermodynamics is primarily the basis for deriving the equilibrium constant of the properties of t...

Stoichiometry /ˌstɔɪkiˈɒmᵻtri/ is the calculation of relative quantities of reactants and products in chemical reactions. Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated. This is illustrated in the image here, where the balanced equation is: CH4 + 2 O2 → CO2 + 2 H2O. Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures thes...

Chemistry is a branch of science that deals with the study of the composition, structure, properties, reaction and behavior of substances. Therefore, chemistry is called central science. This is the essence of our daily lives and occurs in the foods we eat, the air we breathe, the water we drink, are all the result of the chemical reaction process. In fact, osmosis like love, hatred, also driven by chemical reactions. To better understand the almost chemical reactions around us, we have provided everyday examples in two parts. First, an example of a chemical reaction in our body and two examples of chemical reactions that exist outside our body or occur around us. Chemical Reactions In The Body Chemical reactions play an important role in our survival, and living without chemicals can not even be imagined. They participate in the main functions of the body, control our emotions, supervise the process of metabolism and keep the disease. The oxygen we breathe, the...