Answer:
Please find the complete question in the attached file.
Explanation:
Balanced equation:
![8KMnO_4+14NaOH +Na_2S_2O_3 \longrightarrow 8Na_2MnO_4 +2K_2SO_4 +5H_2O +4KOH](https://tex.z-dn.net/?f=8KMnO_4%2B14NaOH%20%2BNa_2S_2O_3%20%5Clongrightarrow%208Na_2MnO_4%20%2B2K_2SO_4%20%2B5H_2O%20%2B4KOH)
Ionic equation:
Net Ionic equation:
![10 OH^- +S_2O_3^- \longrightarrow 2SO_4^- +5H_2O](https://tex.z-dn.net/?f=10%20OH%5E-%20%2BS_2O_3%5E-%20%5Clongrightarrow%202SO_4%5E-%20%2B5H_2O)
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.
Learn more: brainly.com/question/22885959
I think these are the right answers sorry about 5...
1 are determined by the atomic structure and crystal chemistry of the minerals. or hardness
2 acid based reaction
3 rust
4 Examples of physical changes are boiling, melting, freezing, and shredding.
5 I don't know
Answer:
It decreases.
Explanation:
Due to changes in the Coulombic force, the protons within the nucleus of the ion have a much easier time pulling at one fewer electrons. This way, the electrons are pulled closer to the center, causing the radius to decrease.
So if you’re looking at a graph, the favored rxn is forward if product amount is higher at equilibrium, or the reverse rxn is favored if the reactant amount is higher at equilibrium.
You can tell through looking at the K value by seeing if it’s a large number, product is favored which means the forward rxn is favored, but if it’s smaller that means he reactant is favored, meaning the reverse rxn is favored.