ENGLISH NARRATION

UNDERSTANDING REDOXS AND REDOXS CONCEPTS

               Redox is a term that describes the change in oxidation state (oxidation state) of atoms in a chemical reaction.This can be a simple redox process like carbon oxidation that produces carbon dioxide, or carbon reduction by hydrogen to produce methane (CH4), or it can be a complex process such as the oxidation of sugar in the human body through a series of complicated electron transfer.

The term redox comes from two concepts, namely reduction and oxidation.

1)     Oxidation describes the release of electrons by a molecule, atom, or ion.

2)     Reduction describes the addition of electrons by a molecule, atom, or ion.

·       STUDNTE : teacher! So, it can be said of a substance that undergoes oxidation reactions and reduction reactions.

·       TEACHER: Yes of course, redox can also be interpreted as a substance that undergoes oxidation reactions and reduction reactions.

·       STUDNTE : So how is the teacher's mother, we can determine the redox reaction

·       TEACHER: Of course we must know the redox concepts.

Seen from the concept, then the redox is divided into 3 concepts.

               The first based on the release and binding of oxygen.

1.     the reduction reaction is the reaction that occurs due to the release of oxygen from a substance.

2.     oxidation reaction is a reaction that occurs due to the binding of oxygen from a substance.

               The second is based on the binding and release of electrons.

1.     The reduction reaction is the reaction that occurs due to the binding of electrons by a substance.

2.     Oxidation reaction is a reaction that occurs due to the release of electrons by a substance.

               The third is based on the fall and rising of oxidation.

1.     The reduction reaction is the reaction that occurs due to the decline in the number of oxidants.

2.     Oxidation reaction is a reaction that occurs due to the rise of biloks numbers.

·       STUDNTE : Sorry mother teacher, here I am still very lacking in understanding the concept of redox, how we can understand the concept of redox is good dengat,

·       TEACHER: So like this, redox has 3 concepts in it as the mother explained earlier, but the redox was seen from the definition of reduction and oxidation there are 4 namely:

In terms of oxygen:

1.     Reduction is the release of oxygen.

2.     Oxidation ie oxygen capture.

               In terms of hydrogen.

1.     Reduction of hydrogen capture.

2.      Oxidation is the release of hydrogen.

               Viewed from electrons.

1.     Reduction ie electron capture.

2.     Oxidation is the release of electrons.

               In terms of the oxidation number.

1.     Reduction is the decrease of oxidation.

2.     Oxidation ie the rise of biloks.

·       STUDNTE : Thanks to the teacher now I can understand the concepts that exist in redok.

·       TEACHER: Well, because you now understand redox concepts and redox notions, now the teacher wants to ask questions as soon as you understand the material that the mother has to say. So what is the oxidation and reduction number?

·       STUDNTE: 

a)     The oxidation describes the release of electrons by a molecule, atom, or ion 

b)     Reduction describes the addition of electrons by a molecule, atom, or ion.

·       TEACHER: Okay good answer, but Oxidation and reduction precisely refer to changes in oxidation number for actual electron transfer will not always happen. 

Thus, oxidation is better defined as an increase in oxidation number, and reduction as a decrease in oxidation. In practice, electron transfer will always change the oxidation number, but there are many reactions that are classified as "redox" even though no electron transfer reactions (eg involving covalent bonds).

·       TEACHER: Mother teacher think you already very understand the material that mother give, so mother of teacher end with greeting  Wassallammu’allaikum. Wr.Wb.

·       Wa’alaikumsallam. Wr. Wb. 

CAUSE AND EFFECT CHEMICAL REACTION

WEATHERING

Understanding

            Weathering is the process of changing the composition and the breaking of rocks or other materials that occur on the surface of the earth due to the physical, chemical, and biological processes. Weathering is a natural process that works to destroy rocks to the ground. The weathering process destroys and dissolves rock minerals into this soil supported by factors such as time, rock type, topography, organism, and climate. The agents that play a role include water, ice, acid, salt, plants, animals, and temperature changes.

Various Types of Weathering

1.     Physical Weathering and Examples

a)     Physical weathering or often called mechanical weathering is a process of weathering rocks caused by the influence of physical factors on rocks. The most dominant factors in this type of weathering are air temperature, pressure, and salt crystallization. This type of weathering can only be found in extreme climates, such as subtropics, desert areas, coastal areas, and areas with steep topography.

Some examples of weathering physics we can find on earth include:

Desolate rocks in the desert due to extreme daily weather changes. High temperatures during the day make rock expanding, then at night the air temperature drops and makes rocks shrink. This process occurs repeatedly and allows the mineral bonds in the rocks to weaken so that rocks break down into several parts.

b)      Crystallization of brine to rocks in coastal ecosystems. The crystallization of salt water in rock pores around the coastal ecosystem will depress the rocks endogenously to allow rocks to burst.

c)     Rockslide in a steep topographic area. Landslides occur due to high pressure on the rocks of the rock bottom. The pressure causes the bond between the rocks to weaken and apart from each other.

2.     Weathering Chemicals and Examples

               Chemical weathering is a weathering process that results from changes in chemical structure of rocks through certain reactions. The reactions that occur in the weathering process there are 3 kinds, namely solution, hydrolysis, and oxidation. Examples of chemical weathering through these three reactions include:

a)     Lime limestone dissolution process due to its reaction to water.

b)     Rainwater hydrolysis results in an increase in the acidity level around the rocks. Ion H + allows corrosion of rocks.

c)      Oxidation in rocks rich in iron minerals allows the bonding of minerals in rock surfaces to become weak and degraded.

3.     Biological weathering and examples

               Weathering biology or often called organic weathering is a process of weathering rocks done by the organism through its activities around the environment of the rock. The organisms that play a role in this kind of weathering can be animals, plants, fungi, bacteria, to humans.

               The biological weathering process involves two ways, namely biochemical and mechanical means. The following is an example of biological weathering through the 2 ways.

a)     The growth of moss on the rock surface allows the rocks to degrade. The moisture of the rock surface due to the absorption of roots and the high pH around the surface of the rock due to excretion of residual metabolism of moss makes the surface of rocks corrosion.

b)     Penetration of plant roots into the sidelines of rocks suppress the rocks so that they experience a split.

                   Well, so exposure to the understanding and various weathering rocks and examples. Hopefully you can open your horizons about geology and the process of land formation on earth. Regards.

COMPARE AND CONTRAST

Definitions

Compare and contrast essays are multi-paragraph compositions that explain ways in which two (or, very occasionally, more) subjects are similar or different.

In these papers, 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.

The arch-enemy of comparing is contrasting. When you 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.

What Can't these Essays Do?

A compare and contrast essay can cover any topic. But with great power comes great responsibility. The purpose of the essay rules what goes in and what stays out.

In order to make decisions about what to include, writers need to keep one thing in mind: relevance. Relevance helps determine which characteristics are worth comparing and contrasting. We could accurately compare Uberman and Catman by saying that both have two eyes, but that isn't really relevant to our topic. It doesn't help the reader know who would win in a fight.

Your thesis will help you determine the relevance, or irrelevance, of facts. That means you'll need a nice, strong thesis statement, a sentence that lets the reader know your topic and your argument. Something like ''Catman would defeat Uberman, because they are evenly matched in physical abilities, but Catman has greater intellectual abilities.''

How to Get Started

If you're writing a compare and contrast essay, you probably don't have a choice in topic. Your teacher has probably told you to compare and contrast two characters from Romeo and Juliet or the economic systems of Sri Lanka and Japan. These two characters or economic systems will be your two subjects.

You can start by writing qualities of each subject. Then, you can use a Venn diagram to sort the information. A Venn diagram is an organizational tool formed by two overlapping circles that compare two subjects. Each circle represents one subject. Characteristics unique to each subject are written in the non-overlapping parts of the circle, while any similar characteristics are listed in the overlapping part. In this picture, we listed lots of Catman and Uberman's qualities in columns, but we only included relevant ones inside the circles.

 

                                       

 

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