In which pH calculation will a simplifying approximation NOT work? A. [HA]initial = 0.0100 mol L-1, K, = 7.2 x 10-9 B. [HA]initial = 10.0 mol L1, K, = 7.2 x 10-9 %3D C. [HA]initial = 0.0100 mol L-1, K, = 7.2 x 10-3 D. [HA]initial = 10.0 mol L-1, K, = 7.2 x 10-3

9. Find the pH of 0.255 M NH4OH. KB= 1.78 x 10-5.

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7. Find the pH of a mixture of 0.100 M HClO₂ (aq) (Ka = 1.1 x 10-2) solution and 0.150 M HClO (aq) (Ka = 2.9 x 10-8). Find the percent dissociation for HClO2.

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Macmillan Leashilg ao At 25 °C, how many dissociated OH ions are there in 1293 mL of an aqueous solution whose pH is 1.81? 7 101 number of OH ions: R L A: 0 15 % 5 T a f6 6 30 17 & Y ] 7 18 D ➡+ 8 19 即可 9 K fio ▶II O O L fn ►►I 62°F ») 112 + P [ 7 insert ← ions 3:33 PM 10/5/2022 prt sc backspac 1 1

What is the appropriate expression for the given reaction? a. Ka   b. Kb   c. Ksp   d. Kf    e. Kw   f. Kp   1.  NiCO3(s) ↔ Ni+2(aq) + CO3-2(aq) 2.  Hg+2 + Excess I- ↔ HgI4-2 3. H2O(l)↔ H+(aq) + OH-(aq)

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Choose the answers from the box Please answer 7,8,9,10,11

For a temperature of 10C in which Kw= 2.89e-15 and Pkw = 14.539  what is the poH, ph H30+ ?  OH= 1.54e-10 M