Answer: There should be 3.
Explanation:
Answer:
Explanation:
Hello,
In this case, given the percent ionization and the concentration of the acid, one computes the concentration of hydrogen ions as follows:
![\% ionization=\frac{[H^+]}{[HA]}*100\%](https://tex.z-dn.net/?f=%5C%25%20ionization%3D%5Cfrac%7B%5BH%5E%2B%5D%7D%7B%5BHA%5D%7D%2A100%5C%25)
![[H^+]=\frac{\% ionization*[HA]}{100\%} =\frac{4\%*0.30M}{100\%}=0.012M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D%5Cfrac%7B%5C%25%20ionization%2A%5BHA%5D%7D%7B100%5C%25%7D%20%3D%5Cfrac%7B4%5C%25%2A0.30M%7D%7B100%5C%25%7D%3D0.012M)
Therefore the Ka is computed by using the equilibrium expression:
![Ka=\frac{[H^+][A^-]}{[HA]} =\frac{0.012M*0.012M}{0.30M-0.012M}\\ \\Ka=5x10^{-4}](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B%5BH%5E%2B%5D%5BA%5E-%5D%7D%7B%5BHA%5D%7D%20%3D%5Cfrac%7B0.012M%2A0.012M%7D%7B0.30M-0.012M%7D%5C%5C%20%5C%5CKa%3D5x10%5E%7B-4%7D)
And the pH:
![pH=-log([H^+])=-log(0.012)\\\\pH=1.92](https://tex.z-dn.net/?f=pH%3D-log%28%5BH%5E%2B%5D%29%3D-log%280.012%29%5C%5C%5C%5CpH%3D1.92)
Regards.
Answer:
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).
Explanation:
I think the best statement to fill the blank is that "can be desalinized and used for drinking". The said statement seems the most appropriate one because the pH of saltwater is not 10 but approximately between 7.6 to 8.4. Also, saltwater is not found in glaciers, ice caps and aquifers instead it is freshwater.
Answer:
For a mild human cough in air at 20 °C and 50% relative humidity, we found that ... larger droplets are dispersed into smaller ones gradually while moving away from the ... Complex phase change and transport phenomena such as evaporation and ... Natural Ventilation for Infection Control in Health-Care Settings
Explanation
