New answers tagged reduction-potential
2
Once $\ce{Ba^2+}$ is eliminated as poorly soluble barium(II) sulfate, there is a solution of soluble copper(II) and zinc(II) sulfates.
Considering this has been done by careful/gradual addition of sulfuric acid, and the fact that both remaining sulfates undergo hydrolysis, the solution is going to be slightly acidic — this is one reason for sodium hydroxide "...
2
A battery has a small shelf life if it discharges internally. Saying that a discharged battery is in chemical equillibrium (or much closer to it than a fresh one) is a true statement, obviously, but nothing else.
If you reverse the polarity of a primary battery, you get some other reaction than the one happening during discharging backwards. That says ...
0
You can imagine the cell electrodes as capacitors, that are charged by chemical way.
But the capacitance of these capacitors
$$C=\frac {\mathrm{d}q}{\mathrm{d}E}$$
is very small, so does the accumulated charge $q$.
The charge loses due pushing electrons through the wires of a closed circuit are balanced by simultaneous recharging by ongoing redox ...
2
Let's look at how you would add in the water and hydroxide ions for the $\ce{MO4^{3-}->MO(OH)}$ reaction.
Step 1: Start with the given metal species, with the metal oxidation states included:
$\ce{M^VO4^{3-}->M^{III}O(OH)}$
Step 2: Add the electrons according to the oxidation states. Here the oxidation state on the metal drops by two, so there ...
Top 50 recent answers are included
