system surroundings acid enthalpy of neutralization of a strong base by a strong acid

Pure nitric acid is not very stable. Even at ordinary temperature, in presence of sunlight it undergoes slight decomposition. As the temperature increases, the rate of decomposition also increases. On strong heating it decomposes completely to give nitrogen dioxide, water ..

The apparatus is set up as shown in figure 6.15. The combustion tube is heated strongly and concentrated nitric acid is allowed to flow into it. Due to the heat, it decomposes, liberating the corresponding gases. Reddish yellow fumes of nitrogen dioxide, water vapour and a ..

Remember:- Fuming nitric acid is concentrated nitric acid that has a deep brown colour due to considerable amount of nitrogen dioxide present in it. When exposed, some of the nitrogen dioxide escapes and hence the name "fuming nitric acid" is given to it. It is prepare..

The important uses of nitric acid are as follows: 1) Nitric acid plays a significant role in the manufacture of various products such as: Explosives like trinitrotoluene (T.N.T.) nitro glycerine, gun cotton, ammonal etc. Fertilizers such as calcium nitrate, ammonium nitrate..

Sulphuric acid ionizes in water to liberate two hydrogen ions (with a sulphate ion). Hence it is said to be dibasic. Such acids can yield two kinds of salts; the normal salt and the acid salt. ..

Amino acids are colourless, crystalline solids. They are water-soluble high melting solids and behave like salts. The a -carbon atom has 'R' which is a side chain. This side chain is different for different amino acids. The carboxyl and amino groups interact resulting in the t..

However in the laboratory, nitric acid is prepared by distilling a mixture of concentrated sulphuric acid and potassium nitrate or sodium nitrate salt (cheap and easily available). The apparatus is set up as shown in figure 6.13. Potassium nitrate or sodium nitrate is taken in t..

It consists of a steel cylinder, filled with a highly concentrated solution of sodium hydrogen carbonate. At one end is a small receptacle made of strong wire netting. A glass bottle, containing concentrated sulphuric acid is placed inside the receptacle. Just near this bottle i..

. Remember:- No heating is required in when potassium permanganate is used as an oxidizing agent in the above method of preparing chlorine. From sodium chloride, manganese dioxide and concentrated sulphuric ac..

. Zinc displaces copper metal, which acts as a catalyst. Metals below hydrogen (copper, silver, gold and platinum), will not react with dilute acid. They cannot displace hydrogen from the non-metal anion. Note: Copper reacts with oxyacids like nitric acid and sulphuric acid..