If the pH of a somewhat dilute (i. e. ~0.08 to 0.10 M) aqueous solution of HCl is 1.14, then to a good approximation, what is the concentration of hydrogen ions in this solution? Enter your answer to the nearest hundredth.

The concentration of hydrogen ions is 0.07 M

Explanation:

HCl is a strong acid. When it dissolves in water, it dissociates completely in H⁺ and Cl⁻ ions.

From the definition of pH:

pH = - log [H⁺]  

We introduce the pH of the solution (1.14) and calculate the concentration of hydrogen ions ([H⁺]) in M :

[H⁺] = = = 0.0724 M= 0.07 M

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

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enthalpy change for the reaction between the given volumes of the gases is :

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