Chemistry is the science of dealing with the compounds, elements, and molecular structure of matter. Essentially, chemistry is the science of examining substances and objects to find out what they're made of and how the react to different conditions.
A cause-effect relationship is a relationship in which one event (the cause) makes another event happen (the effect). One cause can have several effects. For example, let's say you were conducting an experiment using regular high school students with no athletic ability. The purpose of our experiment is to see if becoming an all-star athlete would increase their attractiveness and popularity ratings among other high school students.
Suppose that your results showed that not only did the students view the all-star athletes as more attractive and popular, but the self-confidence of the athletes also improved.The key principle of establishing cause and effect is proving that the effects seen in the experiment happened after the cause.
Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products. An arrow is drawn between the reactants and products to indicate the direction of the chemical reaction, though a chemical reaction is not always a "one-way street," as we'll explore further in the next section.
For example, the reaction for breakdown of hydrogen peroxide (\text{H}_{2}H2H, start subscript, 2, end subscript\text{O}_{2}O2O, start subscript, 2, end subscript) into water and oxygen can be written as:
2 \text{H}_{2}2H22, H, start subscript, 2, end subscript\text{O}_{2} \text{(hydrogen peroxide)}O2(hydrogen peroxide)O, start subscript, 2, end subscript, left parenthesis, h, y, d, r, o, g, e, n, space, p, e, r, o, x, i, d, e, right parenthesis \rightarrow→right arrow 2\text{H}_{2}\text O \text{(water)}2H2O(water)2, H, start subscript, 2, end subscript, O, left parenthesis, w, a, t, e, r, right parenthesis + \text{O}_{2}\text{(oxygen)}O2(oxygen)O, start subscript, 2, end subscript, left parenthesis, o, x, y, g, e, n, right parenthesis
In this example hydrogen peroxide is our reactant, and it gets broken down into water and oxygen, our products. The atoms that started out in hydrogen peroxide molecules are rearranged to form water molecules (\text{H}_{2}\text OH2OH, start subscript, 2, end subscript, O) and oxygen molecules (\text O_2O2O, start subscript, 2, end subscript).
You may have noticed extra numbers in the chemical equation above: the 222s in front of hydrogen peroxide and water. These numbers are called coefficients, and they tell us how many of each molecule participate in the reaction. They must be included in order to make our equation balanced, meaning that the number of atoms of each element is the same on the two sides of the equation.
Equations must be balanced to reflect the law of conservation of matter, which states that no atoms are created or destroyed over the course of a normal chemical reaction. You can learn more about balancing reactions in the balancing chemical equations tutorial.
The causes of chemical reactions:
1. Occurs due to burning.
2. Occurs due to mixing of substances.
3. Occurs due to the flow of electricity.
The chemical reaction equation is written as follows:
A and B : reactant
C and D : reaction product.
In the reaction equation there is a symbol of the form of substance: s (solid), aq (aqueous), l (liquid) and g (gas).
The effect of chemical reactions
The formation of gas bubbles.
Gases produced in chemical reactions sometimes cause bubbles to form
Formation of Sludge
Color Changes Occurred
Temperature Changes
Lighting
Volume Changes Occurred
Conductivity change
Odor change occurred
Explain briefly about the law of material preservation?
BalasHapusThe law of conservation of mass or otherwise known as Lomonosov-Lavoisier law is a law that states the mass of a closed system will be constant despite the various processes within the system (in a closed system The mass of substances before and after the reaction is the same (constant)) . A common statement used to express the law of conservation of mass is that mass can be deformed but can not be created or destroyed. For a chemical process within a closed system, the mass of the reactants must be equal to the mass of the product.
Hapusplease give me example cause and effect from alpha or gamma!
BalasHapusCause : The alpha rays are emitted from the nucleus at a speed of about 1/10 the speed of light and have a large mass.
HapusEffect :The weakest translucency of alpha rays among the radioactive rays.
How to determine the concentration?
BalasHapusThe way is we can divide mol with volume
Hapusplease explain about the effect of chemical reaction
BalasHapusNuclear means a reaction that occurs inside the nucleus (nucleus) of atoms. The nuclear reactions that take place inside the nucleus. As a result of the reaction generated emission or nuclear radiation. As experienced atomic disaster victims (atomic bombs, Chernobyl, and others). There is a harmful effect if the body or tissue of living cells is exposed to nuclear exposure. In the ionization effect the ionized cells will emit electrons in the chemical bonding structure with the result of the breakdown of cell molecules so that the cell becomes damaged by rupture.
HapusIn biochemical effects, most living cell tissues formed from air will cause air molecules to break down into H and OH ions and neutral atoms that are so easily bonded with other chemical elements. Mokelul that rupture will make the network cells damaged. Due to damaged tissue then the sensitivity or response of the network decreases, this effect is called the somatic effect. A decrease in the response of bone marrow tissue and hemopoetic system, tissue tools, glandular tissue, muscle tissue and nerves.
Why do you take an example of an experiment using regular high school students with no athletic ability why not blend chemistry?
BalasHapuscan you explain more detailed about "equations must be balanced to reflect the law of conservation of matter, roomates States that no atoms are created or destroyed over the course of a normal chemical reaction."?
BalasHapus"Cause of chemical reaction: Happened by burning."
BalasHapusPlease explain?
Energy Changes in Chemical Reactions
HapusEarly wood burning shows a chemical reaction with energy changes. When firewood, energy is released. Some energy is hot to the environment and partly released as light. Substances that when memorized large amounts of air are used as fuel. Wood, coal, oil, kerosene and natural gas can all be used to generate energy for heating purposes when reacted with oxygen in the air.
Exothermic and endothermic reactions | Energy Change
Chemical reaction
The energy released in the reaction occurs when the reactant has a higher energy of the product. The resulting potential energy is referred to as the amount of heat or enthalpy of the substance and given the symbol H.
The collection of atoms or molecules involved in chemical reactions is called the system and everything that exists around it is called the environment. If the reaction consists of a solution, the species involved in the reaction is called the system and the solvent is called an environment. In the gas reactions only molecular constituents as a system.
If the enthalpy decreases during the reaction, energy appears to be released into the environment, for example, when methane is burned in the air, the exhaust heat indicates the enthalpy that occurs when the reactants are converted into products.
CH4 (g) + 2O2 (g) -> CO2 (g) + 2H2O (aq) + energy
what is the function of cause and effect in our daily life?
BalasHapusThe relationship in which one event (cause) occurs for another event occurs (the effect). One reason could have some effect. So that we can mengajuhkan chemical reactions that occur
HapusAre there any negative effects of chemical reactions?
BalasHapusWhy in the chemical reaction effect occurs Sludge Formation?
BalasHapusFormation occurs between hydrocarbons that can dissolve in air or air in a chemical solution, this is due to chemical structure. Create side effects for the environment. Especially in the area around the industry or effects for all environments
HapusHow to write the equation of the reaction?
BalasHapusChemical changes or commonly called chemical reactions are usually written in the form of a reaction equation. In the same way to fulfill the law of mass and power of Dalton atoms. One postulat atom of Dalton states that the type and number of atoms involved in ordinary chemical reactions can not be tampered with. In fact, Dalton's atomic postulate matter only describes the law of mass preservation.
HapusExample 1
Aluminum with O2 aluminum oxide gas form. Write down the equation of the reaction and its equity?
1) Write down the chemical formula or symbol of reactant and product elements in the form of each species.
Al (s) + O2 (g) → Al2O3 (s)
2) Set a word from one species equal to 1 (usually a species whose chemical formula is more complex).
In the above reaction a more complex species is Al2O3 = 1
3) The elements of the state are directly related to the substance called 1.
Coefficient of Al2O3 = 1
Then Al is true sized = 2
Al left left = 1
In order for the number of Al atoms on both sides to be equal then Al on the left side is given a coefficient 2. The reaction equation becomes:
2Al (s) + O2 (g) → Al2O3 (s)
Atom O
Coefficient of Al2O3 = 1
Atom O is true = 3
Number of left left O atoms = 2
In order for the number of O at both sides to be equal, O on the left is named 3/2. The reaction equation becomes:
2Al (s) + 3 / 2O2 (g) → Al2O3 (s)
In order not to be fractions in both segments multiplied by one number in order to be integers. To get an integer, the two segments multiplied by 2, yield the same reaction equation as the word in the form of integers:
4Al (s) + 3O2 (g) → 2Al2O3 (s)
4) alms is now too old if there are still other elements.