USING ENGLISH TO PREDICT RENDEMENT OF A REACTION

Rendement

                    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:

                    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 practice. Calculate the percentage of rendement that is by using the following equations percent rendemen = weight yield / weight of yield divided by the sample weight multiplied by 100%

Calculating Rendemen Value

              

               Rendement is the ratio of the amount (quantity) of oil produced from the extraction of aromatic plants. Rendemen use percent unit (%). The higher the yield value indicates that the value of the oil produced is more benyak. Increasing the yield or the ratio of the amount of oil produced can be done with two approaches,  First, the process of cultivation. Second, the process of making oil The quality of the oil produced is usually inversely proportional to the number of rendaments produced. The higher the resulting rendamen the lower the quality obtained. The formula for calculating the following rendamen:   Each plant has a different rendament value, below can be seen examples of some redamen values: Table Rendamen Varieties Some Types of Asiri Plant

Various kinds of chemical reactions or types of chemical reactions consist of:

coalescing reactions, decomposition reactions, change reactions and metathesis reactions, combustion reactions. Check out the full review below.  Ironing is one type of chemical reaction Chemical reactions can be observed from changes, such as changes in color, changes in shape, and the main thing is the change of substances accompanied by changes in energy in the form of heat. Chemical reactions are the key to chemistry. By reacting a substance means we turn the substance into another substance, both the nature and the form. Thus, if we expect a substance that has certain characteristics, we must try to find raw materials that when reacted with certain substances produce substances that we expect. Chemists are trying to create new materials that are very useful for the benefit of mankind. The following will explain some types of chemical reaki that can be done dilaboratorium. TYPES OF CHEMICAL REACTIONS By knowing some properties or types of reactions, we can understand the chemical reactions more easily. Generally, chemical reactions are classified by type as follows: 1. Reaction of merging 2. Decomposition reaction 3. Reaction of change (single exchange reaction) 4. Metathesis reaction (multiple exchange reaction) 1. MUTUAL REACTIONS The merging reaction is a reaction in which two substances merge to form a third substance. The simplest case is when two elements react to form a compound. For example sodium metal reacts with chlorine gas to form sodium chloride. The equation of the reaction:

2Na (s) + Cl2 (g) → 2NaCl (s)

Other examples are the reaction between white phosphor and chlorine gas. In limited chlorine amounts, 

phosphorus reacts to form phosphorus trichloride, PCl3, a colorless liquid.

P4 (s) + 6Cl2 (g) → 4PCl3 (l)

If the chlorine is excessively available, the resulting phosphorus compound is phosphorus pentachloride, 

PCl5, a white solid.

P4 (s) + 10Cl2 (g) → 4PCl5 (s)

Other merging reactions involve the compound as reagents. For example: phosphorus trichloride reacts 

with chlorine gas to form phosphorus pentachloride. The equation of the reaction:

PCl3 (l) + Cl2 (g) → PCl5 (s)

2. REACTION OF PUNISHMENT

                    The decomposition reaction is a reaction when a single compound reacts to form two or more 

substances. Usually this reaction requires a rise in temperature for the decomposable compound by increasing 

the temperature eg KclO3. This compound when heated will decompose into KCl and oxygen gas. The equation of the reaction:

KClO3 (s) → 2KCl (s) + 3O2 (g)

Decomposition of potassium chlorate is commonly used to generate laboratory oxygen gas.

The decomposition reaction is commonly applied in limestone processing in the area of ​​West Java cipatat. Limestone, 

CaCO3 extracts that can be used as building materials need to be further processed into tohor, CaO. The processing of limestone 

is done by way of roasting limestone in the stove. The chemical equations are:

CaCO3 (s) → CaO (s) + CO2 (g)

In this reaction, a single compound is broken down into two different substances.

3. REACTION OF EXCHANGE

               Reaction of a change or also called a single exchange reaction is the reaction in which an element reacts with a compound to replace 

the element contained in the compound. For example, if the copper metal plate is immersed in a silver nitrate solution, a silver metal crystalline 

is produced. The equation of the reaction is:

Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu (NO3) 2 (aq)

               Copper replaces the silver contained in silver nitrate, producing a solution of copper nitrate and silver metal. If the logamseng plate is 

immersed in a blue sulfate copper solution, then on the surface of the zinc metal there will be a red copper deposit, and the blue color of the solution 

slowly fades. This shows that zinc reacts with copper sulfate to produce copper metal and a colorless zinc sulfate solution.

4. METATESIS REACTION

               The reaction of metathesis or multiple exchange reactions is a reaction involving the exchange of parts of the reactants. If the reagents are 

ionic compounds in solution form, the exchange portion is the cation and anion of the compound. For example a colorless potassium iodide solution is 

mixed with lead (II) nitrate solution which is also colorless. The ions in the solution react to form a yellow precipitate of the lead (II) iodide compound. 

The equation of the reaction:

2KI (aq) + Pb (NO3) 2 (aq) → 2KNO3 (aq) + PbI2 (s)

Iodide ions in the potassium iodide solution exchange with nitrate ions from lead (II) nitrate solution, yield a colorless potassium nitrate solution and a 

yellow i (y) iodide lead solid, as PbI2. The acid and base reaction that produces salt, is also considered a metathesis reaction. For 

example the reaction between hydrochloric acid, HCl (aq) and sodium hydroxide (aq), the equation of the reaction:

HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

The acid-base reaction is also called the neutralization reaction, because it occurs the inclusion of the H + charge by the electrically neutral (H2O) 

water-formed OH. The salt of NaCl formed remains in solution as its ions.

COMBUSTION REACTIONS

               The reactions we consider so far can be characterized as reactor reactions of atoms. However, we need to add another kind of reaction that is 

the combustion reaction, which is characterized by the fact that one of its reactants is oxygen. The combustion reaction is the reaction of a substance with 

oxygen, usually reacting rapidly with the release of heat forming a flame. If carbon compounds are burned in oxygen or air will form carbon 

dioxide and water vapor when the combustion is complete. However, if incomplete combustion (lack of oxygen) will form carbon monoxide 

gas, or may be formed carbon black (soot). Some examples of combustion of carbon compounds:

CH4 (g) + 2O2 (g) → CO¬¬2 (g) + 2H2O (g)

2CH3OH (l) + 3O2 (g) → 2CO2 (g) + 4H2O (g)

C4H10 (g) + 13O2 (g) → 8CO2 (g) + 10H2O (g)

Ironing, although not commonly considered as combustion, is essentially a combustion reaction, because there is a reaction between iron and oxygen accompanied 

by the release of energy. The iron-cellification reactions are in fact very complex involving water molecules, but we can write the karate in the form of a net reaction, 

which is as follows:

4Fe (s) + 3O2 (g) + nH2O (l) → 2Fe2O3.nH2O (s)

Thus writing about various chemical reactions. If any feedback, suggestions or questions, please comment yes. May be useful….

Source:

Sunarya, Y. (2003). Chemical Association 2. Alkemi Grafisindo Press: Bandung