Calculate the concentration of h3o⁺ in a solution that contains 6.25 × 10-9 m oh⁻ at 25°c. identify the solution as acidic, basic, or neutral. a) 6.38 × 10-9 m, basic b) 1.60 × 10-6 m, acidic c) 7.94 × 10-11 m, acidic d) 7.38 × 10-3 m, basic e) 4.92× 10-5 m, acidic

B) M, acidic

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

Given :

As pH is less than 7, the solution is acidic.

Thus solution is acidic and concentration of is

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.