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Combine electrod used in ph meter
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Why is the pH meter placed in distilled water before testing each solution?
Not the pH-meter, but the electrode.
Should you rinse the pH meter between readings?
The electrode must be carefully rinsed.
The principles of pH meter?
When you place the PH electrode in a PH unknown solution you'll find that an electrical potential difference is produced. THIS IS DUE TO: Difference of H+ ion concentration between the test solution and the glass bulb electrode (part of PH electrode that is sensitive to H+ ion concentration) After that the potential difference of the reference electrode (another part of PH electrode) is measured and compared to the potential of the glass bulb electrode by means of a meter. results are read from 0-14 The porous glass of the electrode prevents the H+ ions to diffuse from both sides, but allows the exchange of Na+ ions (contained in the silicates of the glass) with the external solution, for keeping the continuity ot this electrical system. The H+ activity difference between the solution inside the electrode and the external one is measured as electric potential difference, then, converted in pH units (0-14) by the instrument.
Why glass electrode cannot be used for solution of Ph above 9?
This is because of alkaline error above pH of 9. Alkaline Error is a systematic error that occurs when glass electrodes are used to read the pH of an extremely alkaline solution (pH above 9); the electrode responds to sodium ions as though they were hydrogen ions, giving a pH reading that is consistently too low. However it is now possible to purchase [H electrodes made from special glass that can be used above pH 9.
Are there any differences between pH meter and litmus paper recordings?
Litmus papers can only be used to determine whether the solution is acidic or basic. But from pH meter, the pH range of the solution can be determined.
Function of pH meter?
A pH meter measures the pH of a solution utilizing a glass electrode and a voltmeter.
What type of electrodes use in pH meter?
Examples: glass electrode, combined electrode, platinum electrode
Why is the pH meter placed in distilled water before testing each solution?
Not the pH-meter, but the electrode.
Why the pH meter is always kept in saturated KOH solution?
KCl is a salt having Ph 7, it is highly ionizable.yet a small leakage of ions from the reference electrode is needed, forming a conducting bridge to the glass electrode. A pH meter must thus not be used in moving liquids of low conductivity. Sushant kumar
What is a pH meter used for?
[http://www.answers.com/topic/ph-meter-1Click here for the answer from Answers.com]See the Related Questions for more information about pH and what it measures.
Ph meter is an electronic instrument with an electrode that is sensitive to the what ions?
The pH meter measures the concentration of hydrogen ions (H+) in an aqueous solution
Can you find the pH level of the inside of a plant?
Yes, using a pH-meter and a special designed combined electrode.
Should you rinse the pH meter between readings?
The electrode must be carefully rinsed.
Where can you buy a pH meter an electronic instrument used to measure pH by the use of an electrode used in testing home canned foods?
I would checkout Jenco pH meters available at its co-op store at http://www.Supplycloud.com/jenco . A low cost but very advanced model is the Jenco 618C (or 618F).
What is the difference between a universal indicator and a pH meter?
A pH meter is an ion selective electrode (H+), it gives pH to a far more accurate figure and leaves no room for interpretation (based on wetness of strip, colour may appear to show different pHs with univ. indicator
What are two methods used to measure pH?
pH paperselectronic pH meter
What is the measurement of hydrogen ion concentration?
A measurement of hydrogen ion concentration is pH, which equals-log[H+], which is the negative logarithm of the hydrogen ion concentration (actually activity, but that is usually ignored). This quantity can be measured with a hydrogen electrode (as found in a pH meter), which is a type of ion selective electrode.
