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- The dissociation of the weak acid acetic acid (CH3COOH) is represented by the equation below. Enter the equation including all formatting and physical states in the answer blank. CH,COOH(ag) + H,0() – H,0*(aq) +CH,Coo"(aq) x | x. Me -. 8. (agi.HF(g) + H,O(1) H,0*(aq)+ F"(aq) K = 1.1 x 10-3 F (aq) + HF(g) HF;(ag) K= 2.6 x 10- a. Is fluoride in pH 7.00 drinking water more likely to be present as F"(aq) or HF2 (aq)? O HF2 (aq) O F(aq) b. What is the equilibrium constant for this equilibrium? Number 2 HF(g) + H,0(1) H,0*(aq) + HF, (aq) c. What are the pH and equilibrium concentration of HF2" in a 0.150 M solution of HF? (HF, - Number Number pH = M Check Answer View SolutionTo analyze an aspirin sample, 0.3470 g of crushed tablets are weighed and treated with 50.00 mL 0.1155 M sodium hydroxide, boiling for 10 minutes. Under these conditions the acid acetylsalicylic (MW, 180) reacts according to: CH3COO-C6H4-COOH + 2 OH- → OH-C6H4-COO- + CH3COO- The excess NaOH is then titrated with 11.5 mL of 0.2100 M HCl. What is the purity of said show ?.
- TUOv to lls worla taum uo 1o9TIOoni bolam od lliw elimu iboo lut o 19 4. Given the Borax reaction below, what would be the solubility product (Ksp) of borax at 40 °C, if the solubility of borax is 0.8 mol L¯1 at 40 °C? Na,B4O5 (OH)4 · 8H,O(s) = 2Na+ (aq) + B405(OH) (aq) +8H,O(1) sr vol (A) gnsb vgotino brrbae ar bo CHO)gab xglerino bisbasie orb il Soi ms uwn aci- dissociation constant, K. K,, etc. For example, a diprotic acid HA reacts as follows: The change in concentration (y =0.000064 mol Lis negligible compared to the initial concentration (0.083 mol L), so the simplitying approximation was valid. HA(ag) + H; O() = H,O" (ag) + HA (aq) Ka H,0*HA HA] Part C HA (ag) + H2O()= H,O (aq) + A? (aq) Calculate the equilbrium concentration of HC,O, in a 0.20 mol L solution of oxalic acid. Express your answer to two significant figures and include the K HA appropriate units. > View Available Hint(s) In general, K., = [A-| for a solution of a weak diprotic acid because H,0] [HA ]. HÀ ? Value [HC,0,) Units SubmitConsider the reaction at 25 degrees celsius 2NO3-(aq)+8H^+(aq)+3Cu(s)=3Cu2+(aq)+2NO(g)+4H2O(l) At what pH is the reaction at equilibrium with all other ionic species at 0.01M and gases at 1 atm?
- Calculate AG and the exponent value (the x of 10) for K, for the following reactions at 25°C: (a) Mg(s) + Pb²*(aq) = Mg²"(aq) + Pb(s) AG :-430.3 x: 75 (b) O2(8) + 4H (aq) + 4FE2"(aq) 2H,O(!) + 4Fe* (aq) AG :-177.5 x: 31 (c) 2Al(s) + 312(s) 2A1*(aq) + 6T (aq) AG 1280.4 x:23Tamples of NaP (a) and NIL,CI () re dissolved n separate beakers that each contan 100 ml.of water One of the salts produces a slghtly ackde sotion which of the fulowing quatens best represents the formation of the slightly acide solution Na' (ag) + 21,0() NaOH (ag) + H,0 (ag) F (ag) + H,O()HP(ag) +OH (ag) c) NH, (ag) + H,0 ()= NH, (ag) + H,0" (ag) CI (ag) + H,0() HC(og) + OH (ag)6-Consider the first ionization of sulfurous acid: H2SO3(aq) → H*(aq) + HSO3 (aq) Certain related thermodynamic data are provided below: H2SO3(aq) H* (aq) HSO3 (aq) ----- Hf kcal/mole -145.5 -151.9 S° cal/mole K 56 26 (a) Calculate the value of AG° at 25°C for the ionization reaction. (b) Calculate the value of K at 25°C for the ionization reaction. (c) Account for the signs of AS° and AH° for the ionization reaction in terms of the molecules and ions present.
- Calculate AH for the reaction ClF(g) + F2(g) -----> CIF3(G) from the following data: 2CIF(g) + O2(g) > Cl½0(g) + F2O(g) 2CIF3(g) + 202(g) -----> Cl½O(g) + 3F20(g) 2F2(g) + O2(g) -----> 2F2O(g) AH = 167.4 KJ --- -- AH = 341.4 KJ AH = -43.4 KJUsing the following equations, determine (a) Equilibrium expressions, K, and K2; (b) The equation for the reactions that the sum of the two equations; (c) The equilibrium expression, K3, for the sum of the two equations 1. CO33 (aq) + H*(aq) 2HCO;"(aq) 2. HCO, (aq) + H*(aq) H,CO;(aq) K¡ = ? K3 = ?Introductory Chemistry presented by Macmillan Leaming Revell SECOND EDITION Complete and balance these equations to show how cach clement reacts with hydrochloric acid. Include phase symbols. гсаction a Mg(s)+HCKaq) – reaction b: Zn(s)+HCI(aq) – reaction c: Fe(s)+HC(aq) –