Cause and effect if a chemical reaction occurs
Chemical change is a change that produces new substances
with new properties. Chemical changes are often referred to as chemical
reactions.
Chemical reactions are said to or take place if one of the
following things should be observed: they produce gas, sediment, temperature
change and color change. Chemical reactions are a process whereby new
substances, the reaction product, are formed from some of the original
substances, called reactants. Usually a chemical reaction is accompanied by
physical events, such as discoloration, sediment formation, or gas generation.
Symbols expressing a chemical reaction are called chemical equations.
The characteristics of a chemical reaction are:
1. Color Changes occur
In chemical reactions, the reactants are converted into products. Changes
that occur can be caused by the breakage of antagonic bond reagents and the
formation of bonds that bru make the product. To break the bond needed
energy. To form a
new bond, it releases some energy. Thus,
in chemical reactions there is a change of energy.
Chemical reactions that produce energy in the form of heat are called exothermic
reactions. A
reaction that absorbs heat energy is called an endothermic reaction.
Example: Fire can warm a cold body and when inhaling heat in the body because the sport is released so the body becomes cold.
Example: Fire can warm a cold body and when inhaling heat in the body because the sport is released so the body becomes cold.
2. Temperature Changes occur
In chemical reactions, the reactants are converted into products. Changes
that occur can be caused by the breaking of bonds between reacting atoms and
forming new bonds that make up the product. To break the bond
needed energy.
Chemical reactions that produce energy in the form of heat are called
exothermic reactions, while reactions that absorb heat energy are called
endothermic reactions. Chemical
reactions occur in a space we call a system, where the outside of the system is
called the environment. In
an exothermic reaction, there is a transfer of heat energy from the system to
the environment. In
the endothermal reaction is the transfer of heat energy from the environment to
the system.
3. Sedimentation Formation occurs
3. Sedimentation Formation occurs
When reacting two solutions in a test tube, sometimes forming insoluble
solid compounds, and separated from the solution. Solids are called
sediments (precipitates)
4. Gas Formation occurs
Simply put, in the chemical reaction the formed gas is shown in the
presence of bubbles in the reacting solution. The
presence of the gas can be known from its distinctive smell, such as sulfuric
acid (H2S) and ammonia (NH3) that smells rotten.
Chemical reactions can be caused by several things, namely:
·
First,
chemical changes can occur due to combustion.
Chemical reactions from combustion can be observed on paper burning or wood
burning for fuel. In this chemical change, heat energy is given to the
substance to form a new substance. In paper and wood burning, newly formed
substances are charcoal (carbonaceous), and loose gases as smoke.
·
Second,
chemical reactions can occur due to mixing of substances.
Chemical reactions can also occur due to the mixing of two or more
substances that produce a new substance. For example, sodium hydroxide is mixed
with hydrochloric acid to form sodium chloride and water.
·
Third,
chemical reactions can also occur due to the flow of electricity.
Chemical reactions can occur due to the flow of electricity. For example,
when recharging the vehicle battery. The flow of electricity causes a chemical
reaction in the battery, so the battery can be reused.
Acid rain
Acid rain is one of the natural phenomena that occur
today, in fact this incident occurred because of human activity, too, men
issued the gases that can cause the acid rain both through motor vehicles, industries
and much more. To
find out more about acid rain, let's look at the following reviews on the
understanding, causes, and impacts of acid rain.
Understanding Acid Rain
Understanding acid rain is rain that has a low acidity
(pH) is low on each drop of water. Normally
the rain in general has a pH of 5.6 so we can call that rain with a pH level
<5.6 means it's acid rain. Recent
studies have shown that the pH of rain has changed from 6 to 4 due to the
amount of exhaust gases that cause acid rain. These
acid-causing gases are generally generated by natural disasters (volcanic
eruptions) and ulah or from human hands (such as motor vehicle fumes and
industry)
The Cause of Acid Rain
The occurrence of acid rain is certainly not without
cause, there is a certain cause behind it. As
mentioned earlier, the greatest causes of acid rain are from natural disasters
(volcanic eruptions) and human handicrafts (motor vehicle fumes and
industries). Therefore,
it is necessary for the active role of all parties so that the danger of acid
rain can be overcome, for example, people use tools (machine or environmentally
friendly vehicles), the government socializes the movement for love of the
environment, and so on.
Impact of Acid Rain
Acid rain has a negative effect on the environment and human life. Therefore
we must immediately play an active role in tackling the occurrence of prolonged
acid rain. And
here's some of the effects of acid rain:
1. Acid rain affects human health, can cause heat.
2. Acid rain can damage and interfere with plant growth.
3. Acid
rain can damage existing buildings on the ground (rusty).
4. Acid
rain can kill a wide variety of aquatic organisms.
5.
Acid rain can
increase the concentration of metals in water.
Why color changes in the solution when mixed
BalasHapusBecause the pH of the solution changes.
HapusDuring the acid-base titration process there is a change in the pH of the titrat for example when the acid solution is titrated with a base, the pH of the initial solution is low and during the titration continues to rise. Any state during the addition of a particular titrant will have a certain pH and if a graph is made between the pH of the solution and the titrant volume there will be a graph called the titration curve.
What chemical reaction can't be occur ? Explain please.
BalasHapusAg (s) + HCl (aq) -> does not react because Ag is on the right of the voltaic series
HapusChemical reaction can also occur due to the flow of electricity , please explain about it !
BalasHapusThe electrical element is a direct electric current source derived from a chemical reaction. When used elements convert chemical energy into electrical energy. In the electrical element there is an electrolyte that is a chemical that can conduct electrical current.
HapusWhat are the positive and negative effects that will occur if consuming water refills in the long run?
BalasHapusMost of the people choose depots for drinking water refills at the side of the road. Positive effects, In addition to the price is much cheaper, usually located in an easily accessible to increase the popularity of drinking water refills. Negative Effects, But apparently, drinking water refills this store danger to health. Basically, this is because the sterilization process of drinking water equipment at refill depots, quite vulnerable to bacterial contamination.
HapusHow do we know a chemical reaction can occur???
BalasHapusThe occurrence of a chemical reaction can be known from the changes caused by the reaction. Some of these changes are the formation of sediment, the occurrence of color changes, the formation of gas, and the presence of temperature changes.
HapusWhat is the character of oxidation reaction ?
BalasHapusThe character of oxidation is:
Hapus- Have high bilok
- In the form of molecules and ions easily bind electrons
- In the periodic system the element is on the right
What is the impact of acid rain on the environment?
BalasHapusIt can damage plants, cause rust on metal, damage marble and concrete, can affect the life of aquatic animals
Hapus