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Being given the hydronium (or simply the hydrogen) ion concentration (molarity), one of the easiest properties of the solution to determine is its pH. The pH of a solution indicates the acidity (or basicity) of a given solution. The typical pH range of solutions is from 1 to 14, with 7 being neutral, 1 to 6 being acidic, and 8 to 14 being basic.
To determine the pH of a solution, the negative log (-log) of the hydronium/hydrogen ion concentration (molarity) of the solution is calculated. Thus (assuming that the given hydrogen ion concentration is in molarity (mol/L)),
pH = -log(
) or -log(
pH = -log (<span>7.94 × 10−6 mol/L)
pH = 5.13
Because the pH is less than 7 (within the range 1 to 6), then the black coffee solution is acidic. </span>
To determine the pH of a solution, the negative log (-log) of the hydronium/hydrogen ion concentration (molarity) of the solution is calculated. Thus (assuming that the given hydrogen ion concentration is in molarity (mol/L)),
pH = -log(
pH = -log (<span>7.94 × 10−6 mol/L)
pH = 5.13
Because the pH is less than 7 (within the range 1 to 6), then the black coffee solution is acidic. </span>
<u>Solution and Explanation:</u>
[La3+] = 0.1 M
<u>At the equilibrium: </u>
La(IO3)3 <----> La3+ + 3 IO3-
0.1 +s 3s
Since Ksp is small, s can be ignored as compared to the 0.1
The above shown expression thus becomes:
<u>Answer: 1.4*10^-4 M </u>