Question

. For the reaction: Hz (g) + 12(g) → 2 HI(g), Kc= 12.3 at a certain temperature. If at a given moment in the reaction at that temperature, [Hz] = [12] = [HI] = 3.21 x 10-*M, which direction will the reaction proceed to reach equilibrium? -. For the following reactions, label the acid, base, conjugate acid, and conjugate base: a. H2SO4 (ag) + H20 (ag) → HSO. (ag) + H30* (ag) b. HNO3 (ag) + OH- (aq) → NO3- (aq) + H20 (1) What is the pH of a 5.7 x 10 Ca(OH)2? The Ka for an acetic acid solution is 1.8 x 10%. What is the pH of a 0.235 M acetic acid solution? CH3COOH (ag) → H*+ CH3C00 - Arrange the acids HOBr, HBrO3, and HBrO2 in order of increasing acid strength. Predict whether the following solutions are acidic, basic, or nearly neutral (Ka and Kb values in the appendix)): NaCl b. FeCl3 KCN d. NH4NO3 a. C. 5. What is the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.8 mole sodium cyanate (NaCNO) in enough water to make a 1.0L solution? Ka= 2.0 x 104 What is the pH of the solution resulting in 25.0 mL of 0.20 M HCl titrated with 50.0 mL of 0.10 M aniline (C6H5NH2)? 3. The molar solubility of Manganese (II) carbonate is 4.2 x 10-6 M. What is the Ksp for this compound?

Answer 1

Ana- for the given reaction the value of Kc TA 12.3 → 2 H I 3 12.3 H2(g) + I2193 Ke = [HI] [₂] [I2 concentration at equilibrium any of [ Ha] - [Iz ] - [41] 3-21810 m ke a At ime concentration the Oc [HI]? [H] [I7] [3:21x16] ise ( 3-21816²m 1 [3:21 815*m] Ocz concentration at given time Now key de occur in forward direction so that the becomes equal to ke. Thus the reaction will value of CS Scanned with CamScanner

Ans 2 HSOLO + H₂o trees a) H₂SO4 (aq) + H₂O (aq) Acid H₂SO4 H₂O HSOLO conjugate Base late Base Hot conjugate acid b) HNO3 (aq) + oH f No hold Auld HNO₃- Base OH ate acid Ngolo conjugate base conjugate H₂O CS Scanned with CamScanner