ammonia nh

The reducing character of the hydrides of group 15 elements increases from NH 3 to BiH 3 . Thus, increasing order of reducing character is as follows: NH 3 < PH 3 < AsH 3 < SbH 3 < BiH 3 Expla..

When ammonia is dissolved in water it forms ammonium ions (NH ) and hydroxyl (OH - ) ions by the formation of a co-ordinate covalent bond. This can be shown as follows (Fig. 8.3)...

Question: How is NH 4 OH used as a laboratory reagent? Answer: NH 4 OH is used to detect cations in their salt solutions by precipitating their hydroxides whose colour and solubility in excess NH 4 OH, identifies them. Examples of cations detected are Pb 2+..

. In a displacement reaction an atom or group present in a compound is replaced by another atom or group without bringing any change in the structure of the molecule or compound. In double decomposition reactions the constituents (radicals) of two compounds exchange their places and give rise to tw..

The common ion effect is generally employed in qualitative analysis. The cations of group II (Hg 2 + , Pb 2 + , Bi 3 + , Cu 2 + , As 3 + , Sb 3 + , Sn 2 + ) are precipitated as their sulphides (such as CuS, PbS) by passing H 2 S gas in the presence hydrochloric..

Phosphine has the following electronic structure. Structure of phosphine The electronic structure of phosphine is similar to ammonia in that it has a pyramidal structure. The bond angle H-P-H, however, is = 93 o (e.g., NH 3 =107 ..

The elements of groups 15 form trihydrides of the general formula MH3 such as NH 3 PH 3 AsH 3 SbH 3 BiH 3 Ammonia Phosphine Arsine Stibine Bismuthine ..

The electron releasing groups (like -OCH 3 , -CH 3 , -NH 2 etc) enhance the availability of unshared electrons on nitrogen and increases the basic strength. Electrons withdrawing groups like (-NO 2 , -CN, -X etc) affect the stability of an aromatic ammonium cation and ..

In 1938 G.N. Lewis put forward a more generalized acid-base concept. According to this concept, an acid is a species (charged or uncharged), which can accept a pair of electrons and a base is a species (charged and uncharged), which can donate a pair of electrons towards the formation of a covalent..

Amino acids are compounds containing carbon, hydrogen, oxygen and nitrogen. They serve mainly as monomers (building blocks) of proteins. An amino acid is represented by a general empirical formula R.CH.NH 2 . COOH. Each amino acid has at least an amino (NH 2 ) group and a carbox..