Question

A sample has a hydrogen ion concentration of 1 × 10−2. What happens if the hydrogen ion concentration increases? The acidity decreases. The pH decreases. The hydroxide ion concentration increases. The solution becomes more basic.

Answer 1

Answer : The correct option is, The pH decreases.

Explanation :

As we know that,

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Mathematically it is represented as :

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

According to the question, when the concentration of hydrogen ion increases then the value of pH decreases and the acidity of the solution also increases that means the solution is more acidic in nature.

Hence, if the hydrogen ion concentration increases, the pH decreases.

Answer 2

Answer:

The pH decreases

Explanation:

Hello,

pH is mathematically defined via:

$pH=-log([H^{+} ])$

Since at the beginning, the concentration of hydride ion is 1e-2M, the pH is:

$pH=-log(1x10^{-2} )=2.0$

If it is increased, lets suppose to 1.1e-2, the new pH turns out into:

$pH=-log(1.1x10^{-2} )=1.96$

So the pH decreases, which means that the acidity increases as well.

Best regards.