equivalence point


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equivalence point

[i′kwiv·ə·ləns ‚pȯint]
(chemistry)
The point in a titration where the amounts of titrant and material being titrated are equivalent chemically.
References in periodicals archive ?
A high precision Measuring input, mouse click/ instrument flash proof keyboard and Compact titration for potentiometric end point titration (set) With automatic conditioning and monotonic titration with Automatic equivalence point determination (met) and manual Control of measurement, stirring and dozing.
The acid-base technique utilizes an appropriate color-based indicator that reflects the general pH range of the equivalence point.
The general consensus is that, from an equivalence point of view, no solution is entirely satisfactory and Berman's warnings about the risks involved in attempting the translation of vernacular language are repeatedly quoted (e.
In comparison with the Epton titration you profit from the following advantages: Use of unproblematic solvents instead of chloroform short determination times: only a few minutes per titration objective, computer-supported determination of the equivalence point and therefore improved precision can easily be automated In an extensive Europe-wide interlaboratory test the potentiometric two-phase titration was compared with the Epton method and was found to yield the same analytical results with a better repeatability.
In this method, the equivalence point is obtained from the x-axis intercept.
Thus, we computed the median group equivalence point at each of the eight delays for both costs and rewards (the data from all 28 participants were included in this analysis).
The group equivalence point correlations indicated that there was an inverse relationship between the length of the delay and the strength of the association between cost and reward discounting.
For both conditions, the choice procedure yielded equivalence points that measure the immediate amount reward or cost that is subjectively equivalent to the larger delayed reward or cost.
The precision to be expected from three different methods for determining the equivalence point in a volumetric boric acid-sodium hydroxide titration were examined by Monte Calro simulation.
The equivalence point distributions were skewed and kurtotic only at the 1-week and 1-month delay, and a log transformation did not substantially change the results of the analyses.
The choice procedure yielded equivalence points at which participants were indifferent between the smaller, immediate and the larger, delayed reward for eight different delays of the larger reward.
The equivalence points are used as a measure of school performance and it is expected that the proportion of students who pass at grades 1-3 will be about the same as would get G-D in the unreformed version, whilst the proportion gaining Grade 7 and above are expected to be about the same as those achieving A or above in the old grades.