A 0.408 M solution of benzoic acid has a pH of 2.30. What is the Ka of benzoic acid?   a. 4.21 b. 1.2 × 10-2 c. 2.5 × 10-5 d. 6.2 × 10-5 e. 5.0 × 10-3

rivalime 30. Calculate the [H*] in a solution that has a pH of 7.0. a. 3.9 M b. 10.1 M c. 1.2 x 10 M d. 1.0 x 10-7 M *10

Calculate the pH of a 0.50 M aqueous solution of HF. (K₂ 7.2 x 10-4) A. 3.6 x 10-4 B. 0.019 C. 1.7 D. 3.4

A solution is a mixture of 0.100M weak acid and 0.020M of its conjugate base. The pH of the resulting solution is 5.20. What is the pKa of the weak acid? a. 7.00 b. 4.50 c. 5.90 d. 4.74 e. 8.24

What is the Ka of butyric acid if a 0.025 M butyric acid aqueous solution has a pH of 3.22? a. 2.5×10-2 b. 6.01×10-4 c. 4.83 d. 1.5×10-5

Calculate the pH of a 0.345 mol L-1 solution of formic acid, Ka = 1.8 x 10-4. Select one: a. 3.17 b. 2.49 c. 2.10 d. 1.60 e. 2.04

The pH of 0.100 M Jackmanic Acid, HJa, is 2.24. What is the value of  Ka for the acid?   a. 5.4 × 10-3   b. 4.4 × 10-5   c. 3.5 × 10-4   d. 2.24

1. What is the value of Kb for H2PO4-? A. 1.3 x 10-12       B. 1.6 x 10-7                  C. 6.2 x 10-8            D. 7.5 x 10-3 2. Which of the equations has a Bronsted-Lowry conjugate acid-base pair? A. 2H2  +  O2 ß à  H2O                    C. Zn  +  2HCl  à  H2  +  ZnCl2 B. NaOH  à  Na+  + OH-                   D. H2O  +  HCN  ßà  H3O+  +  CN- 3. What is the conjugate base of HSO4-(aq)? A.  OH-(aq) B.  H2SO4(aq) C.  H3O + (aq) D.  SO4 2-(aq) 4. Which term describes a substance that acts as a proton donor and a proton acceptor? A.  amphoteric             B.  monoprotic            C.  polyprotic D.  acid-base 5. What is t     What is the concentration of hydroxide ions in a solution of 0.350 mol/L HCl(aq)? A.  0.350 mol/L             B.  0.175 mol/L           C.  2.86 x 10-14 mol/L D.  0.650 mol/L 6. A solution contains 3.3 x10-8 M hydroxide ions. What is the pH of the solution? A.  3.25 B.  6.51 C.  7.49 D.  8.00 7. A solution has a pH of…

Given the following Ka values, which one belongs to the strongest acid? The weakest acid?a. 6.2 x 10-8b. 1.8 x 10-5c. 7.5 x 10-3d. 4.9 x 10-10e. 6.8 x 10-4