Sulfuric acid is included into the five of the strongest acids. Need for neutralization of this acid arises, in particular, in case of its leak and at emergence of threat of poisoning with it.
Instruction
1. The molecule of sulfuric acid consists of two atoms of oxygen and oxide of sulfur. It represents the liquid which does not have color and a smell, but having the increased viscosity. The concentrated sulfuric acid has consistence of oil. It can be in liquid state at a temperature no more than 300 degrees. At a temperature of 296 degrees it begins to decay. Also it can be mixed with water. Sulfuric acid is very poisonous and causes burns on skin. In the dissolved look it is neutralized by alkalis and hydrate of ammonia.
2. Also sulfuric acid is capable to interact with sodium hydroxide. The concentrated sulfuric acid is diluted with one portion of NaOH: H2SO4 (konts.) +NaOH=NaHSO4+H2ODlya the diluted sulfuric acid the same alkali in a double size is required: H2SO4 (razb.) +2NaOH=Na2SO4+H2OB both cases at neutralization are formed oxosalts. Na2SO4 is substance of white color therefore at neutralization of sulfuric acid the loss of a white deposit is possible.
3. Besides, also sulfuric acid is capable to interact with sodium hydroxide. The concentrated sulfuric acid is diluted with one portion of NaOH: H2SO4 (konts.) +NaOH=NaHSO4+H2ODlya the diluted sulfuric acid the same alkali in a double size is required: H2SO4 (razb.) +2NaOH=Na2SO4+H2OB both cases at neutralization are formed oxosalts. Na2SO4 is substance of white color therefore at neutralization of sulfuric acid the loss of a white deposit is possible.
4. In addition, sulfuric acid is under certain conditions neutralized by oxides of some metals. So, for example, the diluted sulfuric acid, connecting to barium oxide, forms salt - sulfate of barium and water: H2SO4 (razb.) +BaO=BaSO4+H2ONekotorye metals, for example zinc, well react with the diluted acid therefore salt is formed, and hydrogen is emitted outside: H2SO4 (razb.) +Zn=ZnSO4+H2