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...

Teacher : good morning students Student : good morning mother Teacher : be it disciples, 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. Are the students of you who have not understood the material we are studying today? Student : I am mother (while raising hands), wh...

Chemical reactions in the atmosphere The relative greenhouse effect of different gases in the atmosphere are compared based on their annually averaged “radiative forcing,” a measure of how much energy each gas emits or absorbs per unit area. This is well understood phenomena: laboratory tests of gas interactions with radiation are applied in radiative transfer models of the atmosphere to determine how much heating or cooling can be attributed to each individual greenhouse gas. A recent study by scientists at the NASA Goddard Institute for Space Studies and Columbia University suggests that our understanding of the radiation budget is a little simplistic. The models used by climate researchers usually reflect only the direct effects of a gas’s radiative properties — that is, a gas is modeled to either warm or cool the atmosphere, with no secondary effects on other gases. Of course, the atmosphere is a complex soup of chemicals and gases which interact to v...

Compare compare means describing similarities between the subjects. When we are comparing Uberman and Catman, we might describe their tragic backstories, their secret double lives, and their fondness for crime fighting. Basically, the comparison tells what they have in common. Contrast contrast two things, you explain ways in which they are different. Contrasting Catman and Uberman, we might take note of the way Catman uses his opponent's strength against him, while Uberman depends on brute force. Double buble map Used for Comparing and Contrasting, the third map to be introduced is the Double Bubble Map.This map is created with two Bubble Maps. Two larger circles are drawn with the things to be compared. Middle bubbles are added to show the similarities between the two. Outside bubbles are drawn to the two larger circles with words that show the differences. Organizing your double buble map

1. accuracy = how close a value is to the actual or true value; also see precision 2. acid = a compound that, when dissolved in water, gives a pH of less than 7.0 or a compound that donates a hydrogen ion 3. actinides = the fifteen chemical elements that are between actinium (89) and lawrencium (103 ) 4. aeration = the mixing of air into a liquid or solid 5. alkali metals = the metals of Group 1 on the periodic table 6. allomer = a substance that has different composition than another, but has the same crystalline structure 7. allotropy = elements that can have different structures (and therefore different forms), such as Carbon (diamonds , graphite , and fullerene ) 8. anion = negatively charge ions anode 9. aromaticity = chemical property of conjugated rings that results in unusual stability. See also benzene 10. atom = a chemical element in its smallest form, and is made up of neutrons and proto...

Substance is the material structure does not change. Substances include pure substances and mixtures. Pure substances can be elements and compounds. while the mixture can be a mixture of homogeneous and heterogeneous. Substances can also be classified into acid, alkaline or neutral based on the degree of acidity. A. Elements, Compounds and Mixed Element Consider some kinds of objects, such as screws, rings, pots, pencil, and incandescent lamps. Well, do you know is made of What these objects? Screws made of iron. The ring is made of gold. Wire in incandescent lamps made of tungsten (wolfram). Pan made of aluminum. Pencil lead is made of carbon. Well, iron, gold, tungsten, aluminum, and carbon are examples of elements. After studying the above description, can you conclude whether the element is actually called? The element is a single substance that can not be broken down into other substances simpler through simple chemical reactions. Some of the common elements identified,...