pH

The ionic product of water changes when:

A student added a drop of universal indicator to $1.00$ mL of given solution and found that a green colour is produced. The $\mathrm{pH}$ value of the solution will be

The $\mathrm{pH}$ value of pure water is

The ${\mathrm{H}}^{+}$ ion concentration of a solution is $2\times {10}^{-8} \mathrm{mol} {\mathrm{L}}^{-1}$ . The pH value of the solution is ${\log }_{10} 2=0.3010$.

A milkman adds a very small amount of baking soda to fresh milk, why?

A solution turns red litmus into blue, its pH is likely to be

The concentration of hydrogen ion in a sample of soft drink is $3.8\times {10}^{-4} \mathrm{M}$. What is its $\mathrm{pH}$?

Self-ionisation equation of pure water is as follows.

$2H_{2}O\left(s\right)\rightleftharpoons H_3{O}^{+}+O{H}^{-}$

(i) Pure water is neutral.

(ii) The number of H₃O⁺(hydronium) ions is equal to the number of OH^-(hydroxide) ions.

(iii) Pure water ionises very little.

Which of these statements are correct?

In an experiment to test the pH of given sample using pH paper, four students recorded the following observations:

Which one of the above observations is incorrect?

Equal Volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper.What would be the colour obtained?

Which of the following is acidic in nature?

The hydrogen ion concentration of a solution with $\mathrm{pH}$ value $3.69$ is given by

The $\mathrm{pH}$ of a solution increase from $1$ to $2$ . The concentration of ${\mathrm{H}}^{+}$ion

A solution turns red litmus blue, its pH is likely to be

Which of the following will decrease the $\mathrm{pH}$ of $50 \mathrm{mL}$ of $0.01 \mathrm{M}$ hydrochloric acid?

A solution turns phenolphthalein indicator pink. The most likely $\mathrm{p}\mathrm{H}$ of this solution will be

If the ${\mathrm{H}}^{+}$ concentration of an aqueous solution is $0.001\mathrm{M},$, then the $\mathrm{pOH}$ of the solution would be

As the $\mathrm{pH}$ value of a neutral solution increases, its

A solution when treated with a universal indicator shows a $\mathrm{pH}$ value of $8$. It is a

The average pH value of vinegar is: