Question

How much positive and negative charge is there in cup of water?

Answer 1

equal and opposite ?

Answer 2

not this..... i am asking how much charge i.e., total no of charge(the numeric value)present in water

Answer 3

cant say anything about "1 cup of water" ,,did you mean 1 mole of water ?

Answer 4

@prakharluv the question is answered nicely in ncert text of physics class 12 part 1

Answer 5

Water is a neutral compound and not an anion. Therefore its overall charge is zero. The oxygen has a partial negative charge because it inequally shares electrons with the hydrogens but this is offset by the partial positive charge of the hydrogen.

Answer 6

http://en.wikipedia.org/wiki/Molar_concentration#Examples

There are 55 moles of water in a litre, so let's say 20 moles in a glass.
No. of molecules=Moles*Avogardo's constant
\[Molecules=20*(6*10^{23})=1.2*10^{25}\]
1 molecule has 1+1+8 electrons. That is, I cup has
\[1.2*10^{26}\]Electrons.
The charge on an electron is \[1.6*10^{-19}C\]
So the cup has\[1.2*10^{26} *1.6*10^{-19}=1.92*10^7C\]In negative (and positive) charge.

Answer 7

thnx to all of you:-)