Question

An unknown solution has an H+ concentration of 10-12 moles per liter. Which of the following statements correctly describes this solution?

The solution is basic in nature.

The solution is acidic in nature.

The solution is neutral in nature.

Answer 1

\[pH= -\log_{10} [H ^{+}]\]
So if we substitute the concentration of H+ in that equation we get the pH around 12
If a solution's pH is
1- 5 usually they are acidic solutions
7- a neutral solution
8-15 it is basic !
Since it's around 12 the solution is basic !

Answer 2

There's an easier way though.
Look at the H+ concentration it is very low right?
If it is an acidic solution the H+ should be more than this right?
If it's neutral the H+ concentration should be equal to OH-
In a basic solution OH- concentration is high compared to H+ concentration. Since we can see he concentration of H+ is low it can be considered as a basic solution.

Answer 3

@Rushwr

As you said, \[Ph = -\log_{10}(H ^{+}) \]
so here \[Ph=-\log_{10}(10)=-1 \]
so the solution is heavily acidic

Also, a concentration of 10 moles of H+ per liter is extremely high. So high that even some strong acids don't completely dissociate. So the solution is acidic.

Answer 4

To verify what answer is correct:
@Elsa213
@shreehari499

Answer 5

@niels5x9 U are wrong there. The given value is \[10^{-12}\] So the pH would be 12 . So it's gonna be basic ! :)

Answer 6

oh well he said 10-12 so i thought he meant in the range of 10 to 12