Electrochemistry
A current of $$ 5 $$ ampere is flowing through a wire for $$ 193 $$ seconds . Calculate the number of electrons flowing through the cross section of wire for $$ 193 $$ seconds .
If the current is passed into the solution of an electrolyte
When an electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution, the circuit will not be complete and the ions will have no direction and thus they will move randomly.
Answer is option (A)
A current of $$ 5 $$ ampere is flowing through a wire for $$ 193 $$ seconds . Calculate the number of electrons flowing through the cross section of wire for $$ 193 $$ seconds .
Consider the figure given above and answer the question : Is silver plate the anode or cathode ?
The electrochemical cell given alongside converts the chemical energy released during the redox reaction . $$ Zn(s) + Cu^{2+} (aq) \rightarrow Zn^{2+}(aq) + Cu(s) $$ to electrical energy . It gives an electrical potential of $$ 1.1\,V $$ when concentration $$ Zn^{2+} $$ and $$ Cu^{2+} $$ ions is unity . State the direction of flow of current and also specify whether zinc and copper are deposited of dissolved at their respective electrodes when : An external opposite potential of less than $$ 1.1 \,V $$ is applied .
The electrochemical cell given alongside converts the chemical energy released during the redox reaction . $$ Zn(s) + Cu^{2+} (aq) \rightarrow Zn^{2+}(aq) + Cu(s) $$ to electrical energy . It gives an electrical potential of $$ 1.1\,V $$ when concentration $$ Zn^{2+} $$ and $$ Cu^{2+} $$ ions is unity . State the direction of flow of current and also specify whether zinc and copper are deposited of dissolved at their respective electrodes when : An external potential of $$ 1.1 \,V $$ is applied .
The electrochemical cell given alongside converts the chemical energy released during the redox reaction . $$ Zn(s) + Cu^{2+} (aq) \rightarrow Zn^{2+}(aq) + Cu(s) $$ to electrical energy . It gives an electrical potential of $$ 1.1\,V $$ when concentration $$ Zn^{2+} $$ and $$ Cu^{2+} $$ ions is unity . State the direction of flow of current and also specify whether zinc and copper are deposited of dissolved at their respective electrodes when : An external potential of greater than $$ 1.1 \,V $$ is applied .
Explain how electrolysis is an example of redox reaction.
Electrons are getting added to an element Y : what charge will Y migrate to during the process of electrolysis?
Calculate the number of electrons lost or gained during electrolysis of : $$ (a) \, 2g \,Br^{-} $$ ions , $$ (b)\, 1g \,Cu^{2+} $$ ions .
When $$50\%$$ solution of $$H_{2}SO_{4}$$ is electrolysed by passing a current of high density at low temperature then main products of electrolysis are
The electrolysis of cold sodium chloride solution produces sodium hypochlorite by reacting NaOH and Cl$$_{2} $$ thoroughly. How long (in days) will a cell operate to produce 10 L of 7.45 % (by mass) solution of NaClO if the cell current is 2.5 A? Assume that the density of solution is 1.0 g/ml.