Answer
Verified
317.9k+ views
Hint: Knowing the pH of a compound, gives us an idea about whether the compound is acidic or basic. We should first know whether the statement I mentioned is correct or not. And then accordingly move to statement II.
Complete step by step solution: Examining statement I we get that,
Let us assume that 0.1 M of NaOH is a strong base, so this will produce 0.1mol/L of OH ions in solution.
Therefore,
$\eqalign{
& {\text{pOH = }} - \log \left[ {1 \times {{10}^{ - 1}}} \right] \cr
& = {\text{ }} - \log \left[ 1 \right]{\text{ + }} - \log \left[ {{{10}^{ - 1}}} \right] \cr
& = {\text{ 0 + 1 }} \times {\text{ 1}} \cr
& {\text{ = 0 + 1}} \cr
& {\text{ = 1}} \cr} $
Now we know that,
$\eqalign{
& {\text{pH + pOH = 14}} \cr
& {\text{pH + 1 = 14}} \cr
& {\text{pH = 14 }} - {\text{ 1}} \cr
& {\text{pH = 13 }} \cr} $
Therefore, the pH of 0.1 M NaOH solution is 13.
So, we can say that statement I is true, and statement II is true and is the correct explanation of the phenomena described in I.
Therefore, the correct answer to the question is Option A.
Additional Information: pH can also be defined as equal to the negative log base 10 of the concentration of protons in the solution.
Note: pOH is defined as the measure of the hydroxide ion or ${\text{O}}{{\text{H}}^ - }$ concentration. It is used to express the alkalinity of a solution.
High pH means the solution is basic in nature. High pOH means the solution is acidic in nature.
Complete step by step solution: Examining statement I we get that,
Let us assume that 0.1 M of NaOH is a strong base, so this will produce 0.1mol/L of OH ions in solution.
Therefore,
$\eqalign{
& {\text{pOH = }} - \log \left[ {1 \times {{10}^{ - 1}}} \right] \cr
& = {\text{ }} - \log \left[ 1 \right]{\text{ + }} - \log \left[ {{{10}^{ - 1}}} \right] \cr
& = {\text{ 0 + 1 }} \times {\text{ 1}} \cr
& {\text{ = 0 + 1}} \cr
& {\text{ = 1}} \cr} $
Now we know that,
$\eqalign{
& {\text{pH + pOH = 14}} \cr
& {\text{pH + 1 = 14}} \cr
& {\text{pH = 14 }} - {\text{ 1}} \cr
& {\text{pH = 13 }} \cr} $
Therefore, the pH of 0.1 M NaOH solution is 13.
So, we can say that statement I is true, and statement II is true and is the correct explanation of the phenomena described in I.
Therefore, the correct answer to the question is Option A.
Additional Information: pH can also be defined as equal to the negative log base 10 of the concentration of protons in the solution.
Note: pOH is defined as the measure of the hydroxide ion or ${\text{O}}{{\text{H}}^ - }$ concentration. It is used to express the alkalinity of a solution.
High pH means the solution is basic in nature. High pOH means the solution is acidic in nature.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
The branch of science which deals with nature and natural class 10 physics CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
How do you solve x2 11x + 28 0 using the quadratic class 10 maths CBSE
Select the correct plural noun from the given singular class 10 english CBSE
What organs are located on the left side of your body class 11 biology CBSE
The sum of three consecutive multiples of 11 is 363 class 7 maths CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
How many squares are there in a chess board A 1296 class 11 maths CBSE