1. A 1.186 g sample of a weak acid, HB, in 50.00 mL of solution required 75.00mL of KOH (0.200 M) to reach the equivalence point. After the additional of 15.00 mL of KOH the pH was found to be 3.78.
a) Determine the molar mass and Ka value for the weak acid ,HB.
b) Determine the pH of the solution at the equivalence point.
c) What was the pH of the original acid solution before any KOH was added.
d) What would have been the pH of the solution after the addition of 30.00 mL of KOH to the original 50.00 mL solution of the acid HB?
e) What would have been the pH of the solution after the addition of 80.00 mL of KOH to the original 50.00 mL solution of the acid HB?

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .