An aqueous solution at has a ph of 8.5 . calculate the poh. round your answer to 1 decimal places.

The pOH is 5.5

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression between pH and pOH at is shown below as:-

pH + pOH = 14  

Given that, pH = 8.5

So, pOH = 14 - 8.5 = 5.5

The pOH is 5.5

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is d.) potassium