Question

Write characteristics for ideal solution. Calculate [H+] of ph = 6.4​

Answer 1

Characteristics: For ideal solutions: Enthalpy of mixing (mixH) of the pure components to form the solution is zero. The volume of mixing (mixV) is also equal to zero.

In this problem we are given pH and asked to solve for the hydrogen ion concentration. Using the equation, pH = − log [H+] , we can solve for [H+] as,

− pH = log [H+] ,

[H+] = 10−pH,

by exponentiating both sides with base 10 to "undo" the common logarithm. The hydrogen ion concentration of blood with pH 7.4 is,

[H+] = 10−7.4 ≈ 0.0000040 = 4.0 × 10−8 M.