Oxide gaseous hydroxide from

Elements from Re to Pt are the expected homologs of elements 107 to 110. Chemistry of the halides in these groups is rather complicated it is difficult to reveal any regularity which would allow reasonable extrapolations to the transactinoids. Meanwhile, the above closest congeners show an unexpected common behavior. In the TC experiments with either dry or moist air as a carrier gas, the tracer quantities of Re and platinum metals deposited at surprisingly low temperatures [53]. It indicated formation of gaseous oxides and hydroxides, which were mentioned above in this section. This group property is very specific and allows easy separation from the... 

Will s Stability Test. E. Will developed a stability test in 1900 which consists of determining the volume of N2 evolved from NC when kept at 135°, gaseous products being removed by a stream of C02. The nitrogen oxides evolved during decompn are reduced by hot Cu, and C02 is absorbed by a coned soln of K hydroxide. The volume of N2 is recorded every 15 minutes, and the test lasts for 4 hours... 

Gaseous ammonia is conveniently obtained from a cylinder of the liquefied gas the cylinder must be equipped with a reducing valve. The rate of flow of the gas may be determined by passage through a bubble counter containing a small quantity of concentrated potassium hydroxide solution (12 g of KOH in 12 ml of water). A safety bottle should be inserted between the cylinder and the bubble counter and the reaction vessel the gas may be dried by passage through a column loosely packed with soda lime or calcium oxide lumps (cf. Fig. 4.2). For reactions which require the use of liquid ammonia see Section 2.17.7, p. 116. 

A classic example of a solid—fluid ceramic powder synthesis reaction is that of calcination and dehydration of natural or synthetic raw materials. Calcination reactions are common for the production of many oxides from carbonates, hydrates, sulfates, nitrates, acetates, oxalates, citrates, and so forth. In general, the reactions produce an oxide and a volatile gaseous reaction product, such as CO2, SOg, or HgO. The most extensively studied reactions of this type are the decompositions of magnesium hydroxide, magnesium carbonate, and calcium carbonate. Depending on the particular conditions of time, temperature, ambient pressure of CO2, relative humidity, particle size, and so on, the process may be controlled by a surface reaction, gas diffusion to the reacting... 

---