You have made 1.00 l of an aqueous buffer solution that is 100 mm in both sodium acetate and acetic acid. what is the ph?

pH = pKa = 4.75

Explanation:

The pH of a buffer solution is calculated using Henderson Hassalbalch's equation.

The equation is:

Where

pKa = -log (Ka) = 4.75 [for acetic acid]

[salt] =  concentration of salt or the conjugate base, in the given example it is sodium acetate

[acid] = concentration of acid , here it is acetic acid

As given that the concentration of both the salt and acid is same it means

Thus the pH of solution will be equal to its pKa.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.