These alkali metal oxo salts are generally soluble in water and thermally The alkali metals form salts with all oxo acids. Phosphoric acid (H 3PO 4) are some examples. Carbonic acid (H 2CO 3), sulfuric acid (H 2SO 4), Oxo acids are those in which the acidic proton which is on a hydroxyl group with an oxo group attached to the Therefore they form salts with oxo acids. LiCl is soluble in pyridine.ĬsI has also low solubility due to smaller hydration energy of its two ions.Īlkali metals are electropositive metals. Other halide ions of lithium are soluble in ethanol, acetone, ethyl acetate. LiF is insoluble in water due to its high lattice energy because of small cation and smallĪnion size. Melting and boiling points of alkali metal halides decreases with the increase in atomic mass of the halides as:Īs an example, melting point of NaCl is higher than NaBr.įor given halide ion, melting and boiling points of LiX is always less than NaX.Īll alkali metal halide compounds are soluble Melting and boiling points of alkali metal halides These alkali metal halides are prepared by the reaction of appropriate oxide, hydroxide or carbonate with aqueous hydrohalic acidįluorides of alkali metals are most stable while iodides of alkali metals are least stable. The alkali metal halides have high melting points and they are colourless crystalline solids. Sodium reacts with hydrogen sulfide (H 2S) to give metal sulfide and H 2 gas. Reaction of hydrogen sulfide and group IA metals Sodium reacts with phosphorous in the presence of heat and produce sodium phosphide.

Reaction with phosphorus and alkali metals When sodium, potassium and other alkali metals at below periods is heated in a hot air stream, alkali metal peroxides are formed.Īlso potassium, rubidium can make super oxides. Sodium, potassium react with Oxygen and make relevant Oxide of metal. Liquid Li reacts (burning) with oxygen gas and make lithium oxide. So they alkali metal hydrides react with water, alcohols,Īmmonia and alkyne to eliminate hydrogen gas. Therefore these hydrides behave as strong reducing agents. These ionic hydrides react with compounds Metal hydrides (H -) are given as products. (HCl, HNO 3, H 2SO 4) and emit hydrogen gas and produce relevant alkali metal salt.

Alkali metals on periodic table