A chemist is using a solution of hno3 that has a ph of 3.75. what is [h ] for the solution?
1 answer:
A chemist is using a solution of HNO₃ that has a pH of 3.75. what is [H⁺] for the solution is 1.7 × 10⁻⁴M.
<h3>How do we calculate the [H⁺]?</h3>Concentration of H⁺ ion will be calculated by using the below equation of pH as:
pH = -log[H⁺]
or [H⁺] =
Given that, pH = 3.75
So concentration of H⁺ ion will be calculated as:
[H⁺] =
[H⁺] = 1.7 × 10⁻⁴M
Hence concentration of H⁺ ion is 1.7 × 10⁻⁴M.
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Answer: Option (4) is the correct answer.
Explanation:
Relation between potential energy and charge is as follows.
U =
As it is given that ,
, and
.
Distance between the charges = 1 cm = (as 1 cm = 0.01 m)
Hence, putting these given values into the above formula as follows.
U =
=
=
= J
= 0.00085 J
Thus, we can conclude that the potential energy of this arrangement, relative to the potential energy for infinite separation, is about 0.00085 J.