PLEASE HELP will give brainliest

A. The pH is 4.66

B. The pH is 3.44

C. The pOH is 11.54

Explanation:

A. Data obtained from the question include:

Hydrogen ion concentration, [H+] = 2.17x10^-5 M

pH =.?

pH is simply defined as the negative logarithm of the hydrogen ion concentration. Mathematically, it is expressed as:

pH = - log [H+]

With the above formula, we can calculate the pH of the solution as follow:

pH = - log [H+]

[H+] = 2.17x10^-5 M

pH = - log 2.17x10^-5

pH = 4.66

Therefore, the pH of the solution is 4.66.

B. Data obtained from the question include:

pOH = 10.56

pH =.?

The pH and the pOH of a solution are related with the following equation:

pH + pOH = 14

Thus, with the above equation, we can obtain the pH of the solution as illustrated below:

pH + pOH = 14

pOH = 10.56

pH + 10.56 = 14

Collect like terms

pH = 14 - 10.56

pH = 3.44

Therefore, the pH of the solution is 3.44.

C. The following data were obtained from the question:

Hydrogen ion concentration, [H+] = 3.48x10^-3 M

pOH =.?

First, we shall determine the hydroxide ion concentration, [OH-] in the solution.

This is illustrated below:

[H+] x [OH-] = 1x10^-14 M²

[H+] = 3.48x10^-3 M

3.48x10^-3 M X [OH-] = 1x10^-14 M²

Divide both side by 3.48x10^-3 M

[OH-] = 1x10^-14 M²/3.48x10^-3 M

[OH-] = 2.87x10^-12 M

Now, we can determine the pOH of the solution as follow:

pOH = - log [OH-]

[OH-] = 2.87x10^-12 M

pOH = - log 2.87x10^-12

pOH = 11.54.

Therefore, the pOH of the solution is 11.54.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.