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- Calculate the value of the equilibrium constant, Kc, for the reaction Q(g) + X(g) 2 M(g) + N(g) given that Kc = M(g) = Z(g) 6R(g) 2 N(g) + 4 Z(g) 3 X(g) + 3 Q(g) = 9 R(g) Kel : 3.49 Kc2 = 0.469 Kc3 = 14.4Consider The Following Reaction: CaCO3(S) + 2HCl(Aq) = CaCl2(Aq) + H2O(L) + CO2(G) Write down the quation of the equilibrium constant kc for this reaction11-8. Write the chemical reactions whose equilibrium con- stants are K1 and Kp2 for the amino acid serine and find their numerical values.
- The value of K for aniline, C6H5NH₂, is 7.40×10-10. Write the equation for the reaction that goes with this equilibrium constant. It is not necessary to include states such as (aq) or (1). +Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.64 g. Your answer is correct. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. 0.164 Hint Your answer is partially correct. What was the pH of the ascorbic acid solution before it was evaporated? pH = 2.44 What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i M M11-5. Write the stepwise acid-base reactions for the following species in water. Write the correct symbol (for example, Kb) for the equilibrium constant for each reaction and find its numerical value. HN NH Piperazine CO₂ CO Phuthalate jon
- The equilibrium constant for the reaction2 NO1g2 + Br21g2 ∆ 2 NOBr1g2is Kc = 1.3 * 10-2 at 1000 K. (a) At this temperature doesthe equilibrium favor NO and Br2, or does it favor NOBr?(b) Calculate Kc for 2 NOBr1g2 ∆ 2 NO1g2 + Br21g2.(c) Calculate Kc for NOBr1g2 ∆ NO1g2 + 12 Br21g2.Calculate a value for the equilibrium constant for the reaction (6)*O = (6)0 + (6) ²0 given hv NO2 (9) NO(g) + O(g) K = 2.3 x 10-49 O3 (9) + NO(9) = NO,(g) + O2(9) K = 8.4 x 10-34 (Hint: When reactions are added together, the equilibrium expressions are multiplied.) K =3) One of the main buffer systems found in living organisms is the phosphate buffer system, often used in biological research to mimic cellular conditions. The phosphate equilibrium reactions and their corresponding pKa's are as follows: H3PO4 = H* + H2PO, H2PO, = H+ + HPO?- HPO- = H+ + PO;- pKa1 pКаz —D 7.21 = 12.44 = 2.12 pKa3 (a) Given the above chemical reaction, write out the expression for K, of the buffer system which would predominate at neutral pH conditions. Justify your choice. (b) The human body, and many other lifeforms, prefer an internal pH of 7.2 to maintain homeostasis. However, some more acid-tolerant or basic-tolerant organisms can survive (and sometimes thrive) within different ranges of pH. Calculate the mass and moles of the correct acid and corresponding conjugate base solid (assume you have sodium salts of each base: NaH,PO4, Na,HPO4, and Na PO,) which are needed to make 500 mL of a 0.5 M buffer solution (0.5 M total, including the concentration of acid and base…
- › Calculate the value of the equilibrium constant, Kỵ, for the reaction Q(g) + X(g) — 2M(g) + N(g) given that Kc = M(g) — Z(g) 6R(g) 2 N(g) + 4 Z(g) 3 X(g) + 3 Q(g) = 9R(g) Kc1 = 3.48 Kc2 Kc3 = 0.587 = = 13.6Write the equilibrium-constant expressions and obtain numerical values for each constant in(a) The basic dissociation of aniline, C6H5NH2.(b) The acidic dissociation of methyl ammonium hydrochloride, CH3NH3Cl.(c) The dissociation of H3AsO3 to H3O+ and AsO3^3-.For the acid-base reactions below, fill in the boxes by providing the structure of the conjugate base or conjugate acid, and estimating the value of the equilibrium constant, Keq. ' + SH 요 요 ее в осно + Kea но = Kea = Keq = рказ = 5 + CH3OH + H₂ + pka = 35