Question

What is the hydrogen ion and hydroxide ion concentration for a pOH of 3.557? Is the solution an acid or a base?​

Answer 1

Answer:

Hydrogen ion concentration is 2.773E-4Mole per DM3

Hydroxide ion concentration is 4.093E-11

It is an acid

Explanation:

PH(H3O)=-LogH3O

PH=3.557

H3O=antilog of -3.557

antilog of -3.557=antilog (0.443 -4)

antilog0.443 ×antilog -4=2.773E-4mole per DM3.

(H3O)(OH)=10^-14

H30=2.773×10^-14

OH= 1.00E-14/2.773E-4

=4.093E-11

it is an acid since the concentration of hydrogen ion is more than the hydroxide ion

Answer 2

Answer:

$3.606\times 10^{-11} M$ is the hydrogen ion concentration.

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Lower the value of pH more acidic will the solution.

Mathematically written as:

$pH=-\log[H^+]$

The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Lower the value of pOH more alkaline will the solution.

Mathematically written as:

$pOH=-\log[OH^-]$

The sum of ph and pOH is equal to 14.

pH + pOH = 14

We have:

Solution with pOH = 3.557

The pH of the solution = 14 - pOH = 10.443

$pH=-\log[H^+]$

$10.443=-\log[H^+]$

$[H^+]=3.606\times 10^{-11} M$

$3.606\times 10^{-11} M$ is the hydrogen ion concentration.

$pOH=-\log[OH^-]$

$3.557=-\log[OH^-]$

$[OH^-]=0.0002773 M$

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.