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deeksha sharma Grade: 11
```        1. what is analytical molarity? please explain with example.
2. what is equilibrium molarity? please give example.
3. why anlytical molarity of HCl is zero?```
7 years ago

## Answers : (2)

Srinivas Rao
11 Points
```										Analytical molarity: An analyst (Chemist) prepares 1,2,3 etc... Molar solutions by taking stipulated amounts of solute and solvent. These 1 M, 2M and 3M solutions may thermodynamically behave as 0.8M, 1.5M and 2.2M solutions. Then, these reduced concentrations as termed as active masses.
Active Mass= Activity coefficient x Analytical concentration; always activity coefficient is less than or equal to 1. Activity coefficient tends to 1, if concentration tends to zero. Activity coefficient of gases is called fugacity.
Equilibrium Molarity: It is the molarity, or concentration of a specified substance at the time independent thermodynamic state of dynamic equilibrium.
```
7 years ago
FITJEE
43 Points
```										The total number of moles of a solute, regardless of state, in one liter of solution. Given as moles/L.Calculate the equilibrium molarities of H2, I2, and HI                              H2(g) + I2(g) <--> 2 HI(g)Initial..................... 0.05.... 0.06 ...........0Change...................- x ......- x..............+xEquilibrium.......... 0.05 - x.. 0.06-x...........xEquilibrium constant, Kc = [HI]2 / [H2] [I2] = 58.6......................................… = [x]2 / [0.05-x] [0.06-x] = 58.6Solve for x to get the change in the number of moles, and subsequently the number of moles of each compound in equilibriumMolarity of H2 = [0.05-x] / 1.00LMolarity of I2 = [0.06-x] / 1.00LMolarity of HI = x / 1.00L (2)Equivalent weight is the atomic weight of an element or radical divided by the valence it assumes in a chemical compound.
```
4 years ago
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