United States or Thailand ? Vote for the TOP Country of the Week !
These salts can also be produced by the union of acids with equivalent quantities of certain metallic oxides or hydroxides, called bases, of which those soluble in water are termed alkalis. Alkalis have a caustic taste, and turn red litmus solution blue.
There is a process known called the stripping of wool, and it consists in destroying the colour of wool and woollen goods already dyed, in order that they may be re-dyed. Listen, however, to the important precautions followed: A nitric acid not stronger than from 3° to 4° Twaddell is used, and care is taken not to prolong the action more than three or four minutes. Action of Alkalis.
Word Of The Day