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Q: What is the significance of activity coefficient?
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How do you calculate the mean ionic activity coefficient?

EAgCl,Ag = EoAgCl,Ag - 0.0257 In [y [HCl]] rearange the formula and put the y as ur subject which is basically the mean ionic activity coefficient u want


What serves as standard of comparison to evaluate effect of the independent variable on dependent variable?

The correlation coefficient, plus graphical methods to verify the validity of a linear relationship (which is what the correlation coefficient measures), and the appropriate tests of the statisitical significance of the correlation coefficient.


What is the difference between concentration and activity?

Activity and Concentration • Activity - "effective concentration" • Ion-ion and ion-H2O interactions (hydration shell) cause number of ions available to react chemically ("free" ions) to be less than the number present • Concentration can be related to activity using the activity coefficient γ, where [a] = γ (c) we assume that activity, a, is equal to concentration, c, by setting γ = 1 when dealing with dilute aqueous solutions. But ions don't behave ideally . . . • Concentration related to activity using the activity coefficient γ, where [a] = γ (c) • The value of γ depends on: - Concentration of ions and charge in the solution - Charge of the ion - Diameter of the ion Activity coefficient γz → 1 as concentrations → 0


Where is it not possible to use correlation?

It is not possible to use correlation when the two variables are not related at all. the corelation coefficient value that will be obtained will have no significance.


How is a point-biserial correlation coefficient tested for statistical significance?

See Terrell, C. D. (1982). Significance tables for the biserial and point biserial. Educational and Psychological Testing, 42, 975-981.


In cases of high multicollinearity it is not possible to assess the individual significance of one or more partial regression coefficient true or false or uncertain?

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Which refers to patterns of human activity and the symbolic structures that give activities significance?

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What is the physical significance of damping coefficient?

The damping coefficient applies both to hydraulic circuits and springs. Hydraulics In general, higher the coefficient or viscosity higher is the tendency to ensure steady flow and hence a higher system efficiency. This is governed by the properties of hydraulic oil selected for use. Springs Higher the coefficient, greater is the tendency for a spring to reach a desired equilibrium position. This is governed by the properties of spring material selected for the applciation.