Question

For an acid solution:
A.\[\left[ {{H^ + }} \right] = \left[ {O{H^ - }} \right]\]
B.\[\;\left[ {{H^ + }} \right] < \left[ {O{H^ - }} \right]\]
C.\[\;\left[ {{H^ + }} \right] > \left[ {O{H^ - }} \right]\]
D.\[\left[ {{H^ + }} \right] = 2\left[ {O{H^ - }} \right]\]

Answer 1

Hint: Solution are of \[3\] types generally i.e. Acidic, Basic or Neutral and this classification could be explained by the concentration of Hydrogen ions. So, if hydrogen ion concentration is more than it is an acidic solution and if hydroxide ion concentration is more than it is considered as a basic solution and if both the concentrations are equal then it is considered as a neutral solution.

Complete step by step answer:
In this question, the condition particularly is asked for the acid solution and the options are the concentration terms represented i.e. Hydrogen ion concentration and hydroxide ion concentration. We need to tell that acid solution has a higher concentration of hydrogen ion or hydroxide ion. So, solution can be of \[3\] types mainly if talking in simple terms i.e. Acidic, Basic or neutral solution. These solutions are different on the basis of their \[pH\] or we can say Hydrogen ion concentration.
Generally, the acids are those substances which give out Hydrogen ion when dissolved in the solution and therefore acidic solution will have higher concentration of Hydrogen i.e. \[{H^ + }\] ions. Examples of acid solution are \[HCl,{\text{ }}{H_2}S{O_4},{\text{ }}HNO{}_3\]
Bases are those substance which gives out Hydroxide ion when dissolved in the solution i.e. \[O{H^ - }\] ion and therefore if the basic solution is there then it will have a higher amount of \[O{H^ - }\] ions. Examples of basic solution are \[NaOH,{\text{ }}NaHC{O_3}{\text{ }}etc.\]
Neutral solution is the one which is neither acidic nor basic and it does not release any ion when it is dissolved in the solution. Examples of neutral solutions are water, blood etc.

So, the correct answer for this is C
\[\left[ {{H^ + }} \right] > \left[ {O{H^ - }} \right]\] which means acid solution has higher concentration of Hydrogen ion as compared to hydroxide ion concentration.

Note:
pH is called the potential of hydrogen which could be numerically calculated and is equal to the negative logarithm of hydrogen ion concentration. pH tells about the solution whether acidic or basic or how much acidic or basic the solution is. pH has range from \[0{\text{ }}to{\text{ }}14\] which means that from \[0{\text{ }}to{\text{ }}7\], the solution is acidic and from \[7{\text{ }}to{\text{ }}14\], the solution is basic and if it has pH of \[7\] then it is considered as neutral solution.