Answer
Verified
430.2k+ views
Hint: We know that the nature of the solution whether neutral, basic or acidic is expressed in terms of hydronium ion $\left( {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right)$ concentration. The measurement of concentration of hydrogen or hydronium ion in a solution is termed as pH.
Complete step by step solution:
Let’s discuss pH in detail. The pH of a solution is defined as the negative logarithm of its hydronium ion concentration.
${\rm{pH}} = - \log \left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right] = \log \dfrac{1}{{\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]}}$
We can also say that the pH of a solution is the logarithm of the reciprocal of hydrogen ion concentration. That means, the concentration of hydronium ion is inversely proportional to the pH of the solution. Increasing the concentration of hydronium ion lowers the pH of the solution.
Therefore, the formula to measure pH is ${\rm{pH = }} - {\rm{log}}\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$.
So, the correct answer is Option A.
Additional Information:
Let’s understand pH scale in detail. pH scale is the range for expressing the nature of any solution. We know that at 298 K, hydrogen ion ranges from ${10^0}$ M to ${10^{ - 14}}$M . The corresponding pH range is from zero to fourteen.
1. For a neutral solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$=${10^{ - 7}}$
and pH=7
2. For an acidic solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$>${10^{ - 7}}$
and pH<7
3. For an basic solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$<${10^{ - 7}}$
and pH>7
The nature of the solution can also be expressed in terms of pOH value. For a neutral solution value of pOH is 7, for an acidic solution value of pOH is more than 7 and for a basic solution, its value is less than 7.
Note: Always remember that an acid is a substance that releases hydrogen ion $\left( {{{\rm{H}}^ + }} \right)$ in aqueous solution and a base is a substance that releases hydroxide ion $\left( {{\rm{O}}{{\rm{H}}^ - }} \right)$in a solution. It is also to be noted that releasing of ${{\rm{H}}^ + }$ or ${\rm{O}}{{\rm{H}}^ - }$ is possible only in liquid state.
Complete step by step solution:
Let’s discuss pH in detail. The pH of a solution is defined as the negative logarithm of its hydronium ion concentration.
${\rm{pH}} = - \log \left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right] = \log \dfrac{1}{{\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]}}$
We can also say that the pH of a solution is the logarithm of the reciprocal of hydrogen ion concentration. That means, the concentration of hydronium ion is inversely proportional to the pH of the solution. Increasing the concentration of hydronium ion lowers the pH of the solution.
Therefore, the formula to measure pH is ${\rm{pH = }} - {\rm{log}}\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$.
So, the correct answer is Option A.
Additional Information:
Let’s understand pH scale in detail. pH scale is the range for expressing the nature of any solution. We know that at 298 K, hydrogen ion ranges from ${10^0}$ M to ${10^{ - 14}}$M . The corresponding pH range is from zero to fourteen.
1. For a neutral solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$=${10^{ - 7}}$
and pH=7
2. For an acidic solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$>${10^{ - 7}}$
and pH<7
3. For an basic solution, $\left[ {{{\rm{H}}_{\rm{3}}}{{\rm{O}}^ + }} \right]$<${10^{ - 7}}$
and pH>7
The nature of the solution can also be expressed in terms of pOH value. For a neutral solution value of pOH is 7, for an acidic solution value of pOH is more than 7 and for a basic solution, its value is less than 7.
Note: Always remember that an acid is a substance that releases hydrogen ion $\left( {{{\rm{H}}^ + }} \right)$ in aqueous solution and a base is a substance that releases hydroxide ion $\left( {{\rm{O}}{{\rm{H}}^ - }} \right)$in a solution. It is also to be noted that releasing of ${{\rm{H}}^ + }$ or ${\rm{O}}{{\rm{H}}^ - }$ is possible only in liquid state.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE