析出

Hydrogen evolution is always a possibility in water solutions.

水溶液中氢的析出永远是可能的。

There the solvent evaporates and the solute is deposited.

溶剂在这里蒸发，溶质析出。

It is stirred with 10 % sodium carbonate solution ( 50 ml ) and then with water ( 50 ml ), after which It´solidifies.

与10%碳酸钠溶液 （ 50毫升 ） 混合搅拌，然后再用50毫升水混合搅拌， 从而析出固体。

The addition should be interrupted when brownish vapors are liberated to avoid excessively vigorous reaction.

当有棕色蒸气析出时，加料要中断，以免反应过分激烈。

And thus it does not tend to decompose vapors to the same extent.

这样在某种程序上不致于析出蒸汽。