A reagent that could be used to precipitate mercury(II) ions from contaminated water is H2S.
The precipitation will be shown using a net ionic equation. To show the net ionic equation, we must first write the molecular equation as follows;
Hg^2+(aq) + H2S -----> HgS(s) + H^+(aq)
The total ionic equation is;
Hg^2+(aq) + 2H^+(aq) + S^-(aq) ------>HgS(s) + H^+(aq)
Eliminating the spectator ions, we arrive at the final net ionic equation;
Hg^2+(aq) + S^-(aq) ------>HgS(s)
So, H2S can be used as a reagent to remove Hg^2+ from contaminated water.
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Answer:
Grease is insoluble in water but soluble in kerosene
Explanation:
The molecules in grease are non polar molecules and so can not react with water which is polar to generate enough solvation energy. On the other hand kerosine is non polar so reacts with grease to generate enough solvation energy to dissolve it.
Answer:
Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. Dalton based his theory on the law of conservation of mass and the law of constant composition. ... Parts of the theory had to be modified based on the existence of subatomic particles and isotopes.
Explanation:
Answer:
6 MOLES
YES MATES! TWO MOLES OF N2 REQIURS 6 MOLES OF H2 GASE TO REACT COMPLETLY
Answer:
An ecosystem encompasses living organisms and the nonliving elements of their environments. Hence, the components of an ecosystem include animals, plants, microorganisms, rocks, soil, minerals, atmosphere, and the surrounding water masses. An ecosystem can be huge, cutting across several nations, or it can be relatively small, such as the body of an animal, which is home to numerous microorganisms.
We can describe ecosystems under two headings – natural ecosystems and unnatural ecosystems. Unnatural ecosystems, which include agricultural and urban areas, are greatly modified and maintained by human activity. Conversely, natural ecosystems are self-sufficient, balanced ecological units, with a high proportion of native biodiversity and minimal human disruption.
The natural ecosystem is broad. It is divided into two major groups – terrestrial and aquatic ecosystems. These are further divided into many other smaller types of ecosystems as outlined in this article.
Explanation:
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