Asolution has a ph of 4.20. using the relationship between ph and poh, what is the concentration of oh? ? a. 9.9 × 10-1 m b. 6.2 × 10-1 m c. 6.3 × 10-5 m d. 6.7 × 10-6 m e. 1.6 × 10-10m

The correct answer is option E.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions  concentration in a solution. Mathematically written as:

The pOH of the solution is defined as negative logarithm of hydroxide ions  concentration in a solution. Mathematically written as:

The sum of ph and pOH is equal to 14.

pH + pOH = 14

A solution has a pH of 4.20.

Hence, the correct answer is option E.

k

explanation:

k

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.