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a 50.0 ml sample of an acid, ha, of unknown molarity is titrated, and the ph of the resulting solution is measured with a ph meter and graphed as a function of the volume of 0.100 m naoh added. question at which point on the titration curve is [a-] closest to twice that of [ha] ?

Sagot :

Point on the titration is [a-] closest to twice that of [ha] is 1 X 10-5

The point Q corresponds to the half equivalent point i.e at which the half of titrant is used and we know that at half equivalent point

pH=pKa.

In titration, a solution of known concentration (referred to as a titrant) is slowly added to a known volume of a solution of unknown concentration until the reaction approaches neutralization, which is frequently indicated by a color change. To be a primary or secondary standard, the substance known as the titrant must fulfill the appropriate conditions. Titration of a strong acid with a strong base is the simplest of the four types of titrations because it involves a strong acid and strong base that completely dissociate in water, leading to a strong acid-strong base neutralization reaction. Titration is, in general, a technique to determine the concentration of an unknown solution. In order to dispense a strong base into this titration, a burette must be used.

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