Sulfur Oxides are the Result of Burning Fossil Fuels
Acid rain
Rainwater is usually acidic with a pH of around 6. This is because rainwater mixes with carbon dioxide in the air to produce carbonic acid. Well, if the pH of rainwater is less than 5.6 ... this phenomenon is called acid rain.
Acid rain occurs because the air is polluted by substances (oxides) that are acidic, especially sulfur oxides (SO2 and SO3) and nitrogen oxides (NO2).
Sulfur oxides are the result of burning fossil fuels, especially coal, and the metal processing industry. whereas nitrogen oxides come from motor vehicle fumes and industrial fumes.
Acid rain causes losses because it can disturb the balance of the ecosystem, reduce soil fertility, damage buildings especially those made of metal and carbonate rock (marble), kill living things in water, and damage forests because soil pH is too acidic and can cause plants to die. Soil pH ranges from 4 to 8, but mostly between 6.5 and 7.5. In lime soils are usually more alkaline, whereas in sandy or peat (swamps) and clay soils are usually more acidic. Fertile soils are usually in the range of 6.5 to 7.5.
Acid in the Laboratory
very many types of acids used in laboratories, both school laboratories, campuses, as well as company and research laboratories. Among others are..
Bases in the Human Body
Guess what! where is the presence of acid in our body? If you say it's in the stomach, your answer is correct! Yay ... stomach acid is the same HCl (hydrochloric acid) that you used for the lab yesterday. The pH is 1-2 ... strong acid! why does our body need stomach acid with a strong pH?
Remember, how can HCl be able to aluminum plate until it runs out? It's scary if our stomach becomes perforated.
Normally, stomach acid works to kill bacteria that enter the food you eat. God is good, we know that we often eat carelessly. Forgot to wash your hands ... eat along the road a lot of dust ... what ... there must be a lot of bacteria that enter the stomach through these foods. Well ... this stomach acid (HCl) will neutralize everything ... kill the incoming bacteria! Especially if zinc ketek * God forbid * ... but calm ... stomach acid will neutralize it
Gastric acid can also create conditions suitable for protein digestion. So in the process of protein digestion, the enzyme that works on this process only wants if the acidic conditions in the stomach are already right, then he wants to work digesting protein.
You've all used NaOH in practicum right? actually the benefits of NaOH in everyday life are very many. NaOH is known as fire soda. NaOH is the raw material in making soap because it can dissolve fat into soap compounds. This reaction to making soap is called saponification.
Fire soda is also used to wash the sink and open the toilet drain which is clogged with paper or tissue material, because the soda can destroy cellulose which is the basic material of paper and tissue. Soda fire is also commonly used to clean ovens (grills). Fire soda in the industry is also widely used in making paper and rayon as a bleach.
Next is calcium hydroxide Ca (OH) 2 or lime. Lime is usually used by grandmothers for betel and cement mixed building materials. Come on you try to find out, why do grandmothers like betel ?? Hehehe. Lime is also used to neutralize soil polluted by acid rain.
Another example is ammonia (NH3) which is often used in facial cleansers or glass cleaners. Why? because the ammonia base is a weak base. Remember the nature of bases that can dissolve fat.