Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Conductance and conductivity:
When a field (electric) is put across an aqueous ionic solution by applying a voltage between two parallel plate electrodes, the cations are attracted towards to the negative plate (cathode) and the anion towards the positive plate (anode). This movement of ion in a field is called migration and the movement of charge results in a current in the electric circuit connecting the electrodes. The field between the plates is initially linear and produces a constant ion velocity at all points. If there is no redox reaction, cations and anions will separate and collect at the cathode and anode respectively with time, balancing the electrode charge and there will be fewer ions in the bulk of solution. This is a process known as concentration polarization which also leads to the modification of the original linear potential profile between the two electrodes and a variation of ion velocity between the plates. The current will also fall with time. Concentration polarization is therefore useful when separating ions is define, such as in electrophoresis and electro osmosis, but that is to be avoided when measuring fundamental ion motion.
Fig. 1. The effect of an AC voltage on the ion motion as electrode polarity is switched.
The ions then alternately migrate first to one plate and then the other during cycling, so that the ions oscillate around a fixed position, avoiding concentration polarization.
An element L has 9 protons and valency 1. Another element M has valency 3 and 5. What is the difference in the number of electrons in L and M ?
emf series and its applications
which is the main postulate of bohr''s model of atom
Why are they (Lanthanides and Actinides) called Inner Transition Elements?
Q. Occurrence of group 13 element? Both boron and aluminium have a high affinity for oxygen, so neither of them is found native. Boron occurs principally in the earth's crust a
Structure of DNA and RNA The sequence of bases along with the DNA and RNA chain makes its primary structure that controls the particular properties of the nucleic acid. An RNA
The number of electrons in the nucleus of C 12 is (1) 6 (2) 12 (3)0 (4)3 Ans: 0
Nucleophilic aromatic substitution reaction The product is formed by a nucleophilic aromatic substitution reaction in which chloride is displaced by hydroxide ion. The product
Q. Structure of Covalent Bonds? Ans. A covalent bond forms between elements that are near each other in the periodic table While an ionic bond involves an exchange of e
The number of nodal planes in a Px is: (1) One (2) Two (3) Three (4) Zero Ans: One
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd