Answer / g. subrahmanyam

pH meter is basically a scale that tells us whether a
substance is an acid or a base. The pH scale is directly
proportional to OH(-) ion and inversely proportional to H(+)
ion. If the substance is acidic then its pH level will be less
than 7 and if it is basic then it will have a pH more than 7.
The pH electrode contains the following parts.
a. A reference electrode,
b. A glass electrode, whose potential depends on the
surrounding solution pH and,
c. Current meter, the meter can measure the resistance of
the circuit in a great small potential difference.

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

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for which type of applications gas chromatography is used?

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what buffer you can select for acidic nature analyte and how ?

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how you fix the limits of impurities?

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