what is ion selective electrod?
151123
An electrode that is used for analyzing water solutions for the specific analyte involved.  They look like a pH electrode, but measure things like copper and ammonia (if inteferences are not present).  A web search will find you tons of info.
976422
The size of the ion is an important consideration. K+ is bigger than Na +.\n\nIn ion exchange operation, sodium is the most common ion to "slip" from the resin.
1045027
Simpliest way to understand pH is the acidity or alkalinity of a substance or compound. pH range is from 1-14. pH 1 is the most acidic while pH 14 is the most alkaline while pH 7 is Neutral.\n\nIon selective electrodes are electrodes dedicated to a certain ion like copper, nickel etc..etc..\n\nThere are many suppliers of pH electrode and I recommend u try search yahoo for ISI or innovative sensors. The company dedicate their research and development on different sensors and pH/ion selective electrodes for industrial, scientific & research etc. What I know even NASA uses their electrode however better search about this to confirm....lah! http://www.innovativesensors.com/
1053808
Gee, I know you're a student but you are dull and lazy.\n\nHaven't you heard of google??  \n\nStep 1 - I went to www.google.com\nStep 2 - I used the following search  "electroclorination +equation"\n\nhttp://www.google.com/search?hl=en&lr=&q=electrochlorination+%2Bequation\n\nStep 3 - I followed the first link (listed below) on the google.com search results.\n\nAnd you've waited how many days for this answer?  It took me less than one minute to find.
679108
voltametrty is measurement of voltage (which control type of reaction)\nwhile coulommitery is measuerement of electricity quantity (which control the time of  reaction)
911430
Cations are positive.\nAnions are negative.
798090
It's because salt is an electrolyte, a substance containing ions (charged atoms or molecules). The charges are what allow the atoms to conduct electricity, I think.
810698
1. VERY PURE water is a poor conductor of electricity. However, very small \namounts of impurities, especially salts, greatly increase the electrical\nconductivity of water.\n2. The main carriers of electrical current are dissolved ions. If a \nbattery is connected to a container of water so that\nthe (+) and (-) poles of the battery are immersed in the water, the\npositive ions will migrate toward the (-) pole and the negative ions will\nmigrate toward the (+) pole (electrical opposites attract). This closes the\n"switch" and electric current flows through the solution.\n3. Different ions can help carry the electric current, some more / some \nless, depending upon their electrical charge and their size. More highly charged, \nsmaller ions are more efficient carriers of the electrical current.\n4. The higher the concentration of ions, the greater is the conductance of \nthe solution.\n5. There is a complication however, the water and / or certain of the ions \nmay undergo a chemical reaction to one or the other, or both of the electrodes.\nYou may not want to introduce this in the beginning but it does happen.\n6. None of the ion electrical current carriers of salts dissolved in water \nare as mobile as "free" electrons in a metal are. And the differences are very\nlarge. For example, if the conductivity of  VERY PURE WATER is 0.000004\nconductivity units, the conductivity of a saturated solution of common\ntable salt NaCl is 23 conductivity units, and the conductivity of a typical\nmetal such as copper wire is 60, 000, 000 conductivity units. So while the\nions in a dissolved salt behave something like "free" electrons, they are\nvery slow and sluggish moving. \nCompletely demineralized water actually does not conduct electricity, and is\nwidely used as a coolant in high powered radio amplifiers.  However, when\nexposed to even small amounts of impurities, (even normal air), It becomes a\nfair conductor.  It is not the water conducting this electricity so much as\nthe dissolved minerals in it.  Some of these minerals are decent insulators\nthemselves, but when dissolved in water still allow conduction because the\nmolecules are now free to move around.\nIn ionic liquids these electrons remain \nstuck to big, round atoms,\nand these atoms do the swimming around, relatively slowly, dragged by \ntheir electric charge.\nSort of a ball and chain thing.\nElectrons in metal are "free"; they slip rather freely across all the \natoms, and do not need to drag one around with them.\nSo, carrier mobilities in ionic liquids are some orders of magnitude lower \nthan carrier mobilities in metals.\nSo their resistance is higher.\nIf you had a snail-trail of salt-water or molten salt with the same length \nand cross-section as a metal wire,\nit would use up half the voltage and get hot trying to pass one tenth the \ncurrent the wire can handle.\nIn a metal, each metal atom contributes about one mobile electron that \nhelps the current flow.\nIn molten salts like NaCl, every atom has a + or - charge and contributes \nto the current flow.\nSo there are just as many carriers per unit volume as in a metal.\nBut in water-solutions of salts, the salt is a minority.\nUsually less than 10%  of the solution is ions, so that makes the \nconductivity even poorer.\nThat is part of why we will never make our power lines out of seawater in \npipes.
1103124
See if these help\n\nhttp://www.rit.edu/~pac8612/webionex/website/\n\nhttp://www.dartmouth.edu/~chemlab/chem3-5/ionx1/overview/procedure.html\n\nhttp://www.culliganmiami.com/pf7.html\n\nhttp://www.wqa.org/sitelogic.cfm?id=1085
685785
Yep- they're all right.  The salt just carries electricity through the water.  Electrolysis would work by adding any ionic compound like salts or acids to the water.  Interesting- that's why you would never get electricuted in pure water because there's nothing in pure water which carries electricity.  Water in nature or in your house has minerals and salts in it which do conduct.
551829
EDTA has very little selectivity so I doubt you will find much more.Masking/demasking agents such as cyanide complexes,phosphate anions.. are nothing else than complexation examples.Another method is called kinetic masking; for example determination of Cr and Fe in steel sample solution (under cool condition,the EDTA will react with Fe first and after you heat the solution the EDTA will react with Cr).The choice of indicator might increase selectivity (different indicators have different reaction rate)but I'm not sure about that one...
872496
An ion is an atom or group of atoms that normally are electrically neutral and achieve their status as an ion by loss (or addition) of an electron(s). The simplest ions are the proton (a hydrogen ion, H+, positive charge), and alpha particle (helium ion, He2+, consisting of two protons and two neutrons) . A negatively charged ion, which has more electrons in its electron shells than it has protons in its nuclei, is known as an anion (pronounced an-eye-on) due to its attraction to anodes. A positively-charged ion, which has fewer electrons than protons, is known as a cation (pronounced cat-eye-on) due to its attraction to cathodes. An ion with a single atom is called a monatomic ion, and an ion with more than one is called a polyatomic ion. Larger ions containing many atoms are called molecular ions. The process of converting into ions and the state of being ionized is called ionization. The recombining of ions and electrons to form neutral atoms is called recombination. A polyatomic anion that contains oxygen is sometimes known as an oxyanion .\n\nIons are denoted by a superscript with the sign of the net electric charge and the number of electrons lost or gained, if more than one. For example: H+, SO42−.\n\nA collection of non-aqueous gas-like ions, or even a gas containing a proportion of charged particles, is called a plasma, often called the fourth state of matter because its properties are quite different from solids, liquids, and gases. Astrophysical plasmas containing predominantly a mixture of electrons and protons, may make up as much as 99.9% of the visible universe [1]. The positively charged proton is about 1836 times more massive than the negatively charged electron.
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Yes. An electrolyte is defined as a species that dissolves in water and produces electrically conducive ions. Stomach acid is concentrated hydrochloric acid. Chloride ions are electrically conductive, so stomach acid is an electrolyte.\n\n>>No, it is not.\nElectrolytes are SALTS. Salts have a perfectly neutral pH. Acid.....well it's acid.<<\n\nMost electrolytes are salts. And no, salts don't have a perfectly neutral pH. Nothing has a perfectly neutral pH, and some salts are most definitely acidic or basic.
870424
in electrochemical cells we have chemical reaction . since conversion of this chemical energy to electric energy is mainly becoz of combination of ions ..we hav electric on account of this chemical energy till we have free ions to combine once all ions of solution combines  no more energy conversion is there
776869
Cloride ions are Cl- therefore they are attracted to the positive.
519301
Electrolyte solution is a solution conducting electricity, any Salt dissociated completely to its ions will be a good electrolyte .Potassium itself is a metal and metals conduction electricity (not electrolyte).potassium chloride KCl is a salt its solution is an electrolyte,it dissociated to K+ ions and Cl- ions.
525723
when an atom loses an electon from its outermost shell then it forms an electropositive ion while when an atom gains an electron it forms an electronegative elctron.\n\nfor e.g. during the formation of nacl na atom loses an elcron to the cl atom to form a +ve ionwhile the cl atom which gains that electon forms a -ve ion.