Hello!
What are some of the impacts on society and environment of the dry cell and silver oxide cell?
And also, what exactly are we required to know for recently discovered transuranic elements?
TIA.
For silver oxide cells, they are non-rechargeable and must be discarded, which can cause potential harm to the environment because the KOH electrolyte is caustic and can leak. Silver is also quite expensive, so the batteries are somewhat expensive. But their small size has allowed them to be used in small appliances like toys and remotes. Dry cells are pretty much the same advantages and disadvantages (small size, non-rechargeable, can leak, etc).
I believe that for the transuranic elements, all you need is its characteristics (how it is made, half life, discovery date, emission). You just need to know the basics about it.
For example:
Pb + 2AgNO3 -> Pb(NO3)2 + 2Ag+
0.1 mol Pb and 0.1 mol AgNO3 react. How much Pb is left over in the final solution?
So, Pb is in excess and AgNO
3 is limiting. To find amount of excess remaining, you get the number of moles of the limiting reagent (0.1mol) and convert that into the moles of Pb reacted (0.05mol) using stoichiometry. Then subtract this 0.05mol from the 0.1mol of the initial Pb because that is how much reacted away. So the excess Pb would be 0.05mol. Basically, you convert limiting into excess that has been used, then subtract that from excess.
Hey guys! I'm a new user so I hope this question goes right 
This is a very basic question, and quite frankly I'm embarrassed that I'm getting so confused on such a minor detail but- in a galvanic cell, what causes the flow of electrons from the anode to the cathode? I understand that the less active metal ions will 'attract' the electrons from the neutral atoms in the anode- but how? And why? They aren't physically connected. Does this mean this attraction will only work within a certain distance?
How do i accept that there is 'just' a force of attraction between the less active metal ions and the electrons from a metal solid that is not physically connected with it?
Hey, welcome to the AN forums!
When a less active metal is connected to a more active metal, in a way that allows electron flow, the less active metal's ions will want to be
reduced (gain electrons), which has a positive reduction potential on the Data Sheet.
The more active metal will want to
oxidise (lose electrons), which has also has a positive oxidation potential on the Data Sheet (flip the reactants/products around). A positive potential indicates spontaneous reaction where the chemical species will want to move to a lower energy state, hence the electrons move to the cathode. In the HSC, you’d just have to accept that electrons flow from anode to cathode because oxidation (at the anode) loses electrons to reduction (at the cathode).
ANODE: Mg
(s) —> Mg
2+ + 2e
-CATHODE: Cu
2+ + 2e
- —> Cu
(s)Hope this helps
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