Rusting is the process in which iron in the open air acquires a iayer of a brownish substance called rust. For rusting, iron should be in contact with both air and moisture. When an iron gate is painted then the layer of paint cuts off the contact between air, moisture from iron. Thus, it prevents …
Explain how the painting of an iron gate prevents it from rusting. Read More »
he difference between the acids and bases are: Acids Base Acids are sour in taste Bases are bitter in taste Acids turn blue litmus to red, bases do not change the colour of blue litmus. Acids do not change the colour of red litmus. Bases change the colour of red litmus to blue.
An acid and a base neutralise each other and form a salt. A salt may be acidic, basic or neutral in nature.
Our stomach contains hydrochloric acid. It helps us to digest food, . But too much of acid in the stomach causes indigestion. Sometimes indigestion is painful. To relieve indigestion, we take an antacid such as milk of magnesia, which contains magnesium hydroxide. It neutralises the effect of excessive acid.
The wastes of many factories contain acids. If they are allowed to flow into the water bodies, the acids will kill fish and other organisms.The factory wastes are, therefore, neutralised by adding basic substances.
Excessive use of chemical fertilisers makes the soil acidic. Plants do not grow well when the soil is either too acidic or too basic. When the soil is too acidic, it is treated with bases like quick lime (calcium oxide) or slaked lime (calcium hydroxide). If the soil is basic, organic matter (compost) is added …
When an ant bites, it injects the acidic liquid (formic acid) into the skin. The effect of the acid can be neutralised by rubbing moist baking soda (sodium hydrogencarbonate) or calamine solution, which contains zinc carbonate.
The reaction between an acid and a base is known as neutralisation. Salt and water are produced in this processwith the evolution of heat.Acid+Base → Salt+Water(Heat is evolved)The following reaction is an example:Hydrochloric acid (HCl) + Sodium hydroxide (NaOH) → Sodium chloride (NaCl) + Water (H2O)
Great care should be taken while handling laboratory acids and bases because these are corrosive in nature, irritating and harmful to skin.
As the name indicates the rain containing excess of acids is called an acid rain. The rain becomes acidic because carbon dioxide, sulphur dioxide and nitrogen dioxide (which are released into the air as pollutants) dissolve in rain drops to form carbonic acid, sulphuric acid and nitric acid respectively. Acid rain can cause damage to …
