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- 1.) In a 0.100M aqueous solution of a weak acid, the acid is 3.7% dissociated. What is the Ka for this acid? 2.) What is the pH of a 0.010M solution of pyridine, C2H5N, a weak base? It's Kb is 1.5x10-9. 3.) Calculate the pH and percent ionization of a 15.0 M solution of a weak base. (pKa=9.26) SHOW ALL WORK!!Options for −CO2H are: pKa 1, pKa 2, pKa 3 Options for -NH3+ are: pKa 1, pKa 2, pKa 3 Options for −CO2H in −R are: pKa 1, pKa 2, pKa 3A saturated Na₂CO₃ solution isprepared, and a small excess of solid ispresent (white pile in beaker). A seedcrystal of Na₂ ¹⁴CO₃(¹⁴C is a radioac-tive isotope of ¹²C) is added (small redpiece), and the radioactivity is mea-sured over time. (a) Would you expectradioactivity in the solution? Explain.(b) Would you expect radioactivity inall the solid or just in the seed crystal? Explain.
- Give typed full explanation The environmental concentration of 239Pu (t1/2 = 24,119 years) in a lake is 3.7x10-6 disin-tegrations per second per liter. What is the molarity of plutonium in the lake?1. could u pls give me example of substances has an activity of 1? is it pure water has an activity of 1? 2. is pH scales is strictly btw 0 and 14? if not, why? 3. what is CSTR? is this heterogenous? is this concentration depends on location? 4. is steady state, mass can enter ot not? leave the control volume or not?Calculate the equilibrium constant at 37°C given ∆G=-423kcal.
- What would be a suitable method for determining the relative activity of A g and C u? What would the experiment prove? Question options: Add A g(s) to C u (N O3)2(a q). If reaction, A g is more active. If no reaction, then C u is more active. Add A g(s) to C u (N O3)2(a q). If reaction, C u is more active. If no reaction, then A g is more active. Add C u(s) to A g N O3(a q). If reaction, A g is more active. If no reaction, then C u is more active. Add C u(s) to A g N O3(a q). If reaction, C u is more active. If no reaction, then A g is more active. Add C u(s) to A g(s). If reaction, A g is more active. If no reaction, then C u is more active. Add C u(s) to A g(s). If reaction, C u is more active. If no reaction, then A g is more active.Show your work, use general chemistry rules for significant figures. 9. Using the reaction HPO42– + 2H+ + 2e– ⇌ HPO32–+ H2O(l) E°= –0.234 V And the Ka values below, calculate E° for H2PO4– + H+ + 2e– ⇌ HPO32– + H2O(l) E°= ??? V H3PO4: pKa1 = 2.148; pKa2 = 7.198; pKa3 = 12.375Like heavy water (D₂O), so-called “semi-heavy water”(HDO) undergoes H/D exchange. The scenes below depict aninitial mixture of HDO and H₂ reaching equlibrium.(a) Write the balanced equation for the reaction. (b) Is the valueof Kgreater or less than 1? (c) If each molecule depicted repre-sents 0.10 M, calculate K.