Asolution with a hydronium ion concentration of 10–11m has a ph of a. 4. b. 3. c. 11. d. 7.

Answer : The correct option is, (C) 11

Explanation :

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

Mathematically, it is represented as :

or,

Now we have to calculate the pH of the solution.

Now put the value of hydronium ion concentration in this expression, we get the value of pH of the solution.

Therefore, the pH of the solution is, 11

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.