The PH of 0

question 20

Multiple Choice

The pH of 0.010 M H₃PO₄(aq) is 2.24; estimate the concentration of PO₄^3- in the solution.For H₃PO₄,the values of K_a1,K_a2,and K_a3 are 7.6 *10^-3,6.2 * 10^-8,and 2.1 * 10^-13,respectively.

• A)5.8 * 10^-3 M
• B)2.1 * 10^-13 M
• C)7.6 * 10^-3 M
• D)6.2 * 10^-8 M
• E)2.3 * 10^-18 M