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NH 4 Cl + NaOH → NH 3 + NaCl + H 2 O. Similarly, ammonium chloride also reacts with alkali-metal carbonates at elevated temperatures, giving ammonia and alkali-metal chloride: 2 NH 4 Cl + Na 2 CO 3 → 2 NaCl + CO 2 + H 2 O + 2 NH 3. A solution of 5% by mass of ammonium chloride in water has a pH in the range 4.6 to 6.0. [12]
The most common Lewis bases are anions. The strength of Lewis basicity correlates with the pK a of the parent acid: acids with high pK a 's give good Lewis bases. As usual, a weaker acid has a stronger conjugate base. Examples of Lewis bases based on the general definition of electron pair donor include: simple anions, such as H − and F −
[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
It is usually generated as a fine yellow precipitate by treating a solution of hexachloroplatinic acid with a solution of an ammonium salt. [2] The complex is so poorly soluble that this step is employed in the isolation of platinum from ores and recycled residues.
In dilute aqueous solution, chloramine is prepared by the reaction of ammonia with sodium hypochlorite: [5] NH 3 + NaOCl → NH 2 Cl + NaOH. This reaction is also the first step of the Olin Raschig process for hydrazine synthesis. The reaction has to be carried out in a slightly alkaline medium (pH 8.5–11).
A comparison between the K a and K b indicates the acid–base property of the resulting solution by which: The solution is acidic if K a > K b. It contains a greater concentration of H + ions than concentration of OH − ions due more extensive cation hydrolysis compared to that of anion hydrolysis. The solution is alkaline if K a < K b.
Sodium amide can be prepared by the reaction of sodium with ammonia gas, [3] but it is usually prepared by the reaction in liquid ammonia using iron(III) nitrate as a catalyst. The reaction is fastest at the boiling point of the ammonia, c. −33 °C. An electride, [Na(NH 3) 6] + e −, is formed as a reaction intermediate. [4] 2 Na + 2 NH 3 ...
Ammonium permanganate was first prepared by Eilhard Mitscherlich in 1824 by reaction of silver permanganate with equal molar amount of ammonium chloride, filtering the silver chloride and evaporating the water. AgMnO 4 + NH 4 Cl → AgCl + NH 4 MnO 4. It can also be prepared in a similar way from potassium permanganate and ammonium chloride.