Introduction Soil can become acidic due to a number of causes. Rain water dissolves carbon dioxide from atmosphere forming carbonic acid. Organic decay from plants and animal results n formation of acetic, citric, oxalic and carbonic acids. When excess H+ ion accumulate in the soil colloid, the soil become acidic. To cure acidity of soil,…
Acids are compound that produce hydrogen ions (H+) when dissolved in water. An acid can be classified as weak or strong depending on the concentration of Hydrogen ions in solution. The strength of the acid is indicated by the scale which defined as the negative logarithm of the hydrogen ion concentration. The smaller number, the…
Waste Cooking oil is a cooking oil that has been used repeatedly. This oil is to used household needs, generally can be reused for culinary concern, but when viewed from its chemical composition, waste cooking oil contains carcinogenic compounds, which occur during frying process (Anonymous, 2011a), so it is quite worrying when we reused for…