. For the reaction: Hz (g) + 12(g) → 2 HI(g), Kc= 12.3 at a certain...
Calculate the pH of a buffer solution prepared by dissolving 19.50 g of sodium cyanate NaCNO (65.01g/mol) in 1.00 M cyanic acid (HCNO) to a final volume of 1.00 liter of solution. Ka(HCNO) = 3.50 x 10-4
all please. its okah if its just the answers 18. Calculate the pH of a buffer solution that is 0.410 M in HOCI and 0.050M in NaOCI. [Ka(HOCI) 3.2 x 10* a. 0.39 d. 749 b. 3.94 e) 6.58 19. Which one of these equations represents the reaction of a weak acid with a weak base! a. H'(aq) + OH (aq)- H:O(aq) b. H'(aq)+ CHsNH2(aq)- CHSNH3 (aq) c. OH (aq) + HCN(aq)- H:O(aq) + CN (aq) d) HCN(aq) + CH...
What is the net ionic equation for the neutralization reaction between a HI with NH3? HI (aq) + NH3 (aq) ⇌ NH4I (aq), HI (aq) + OH- (aq) ⇌ H2O (l) + I- (aq), H3O+ (aq) + OH- (aq) ⇌ 2 H2O (l) H3O+ (aq) = NH3 (aq) = NH4+ (aq) + H2O (l) Which statement about buffers is NOT true? A buffer can be made by neutralizing some of the weak base in solution by adding a strong acid,...
You work in a chemistry lab, and are asked to prepare 500 mL of a buffer solution with pH-3.20, The weak acid solution concentration in this buffer should be 0.250 M and salt is a solid. The following steps walk you through a step by step process of this preparation. a. Choose the proper weak acids for the buffer solution Table 1. Ionization constant Ka for some weak acids Name Hydrofluoric acid Nitrous acid Fulminic acid Acetic acid Hypochlorous acid...
please show all work neatly 5. (2 pts) Consider the following acids and their dissociation constants HPO4-2(aq) + H2O.. H3O"(aq) + PO4-3(aq) Ka-2.2x 10.13 HCOOH(aq) H20 H3O (a) HCOO (aq) Ka = 1.8x10-4 a. Which is the weaker acid, HPO42 or HCOOH? b. What is the conjugate base of, HPO42 or c. Which acid has the weaker conjugate base? d. Which acid produces more ions? 6. (2 pts) Write a balanced equation for the neutralization of H3PO4(aq) and NaOH(aq) (3...
CHE 172 Acid-Base Equilibrium Worksheet 1. Identify the conjugate pairs in the following reaction: HC2H302(aq) + H2O + H20*24) + CH3O2 (aq) 2. Based on the Kb of the following weak bases, which is the strongest base? C6H5NH2 HONH2 H2NNH2 C2H5NH2 Kb = 4.3x10-10 Ko = 1.1x10-8 Kb = 1.3x106 Kb = 6.4x104 Which has the strongest conjugate acid? 3. Calculate the pH of the following solutions: a. 0.25M HBO b. 0.25M Ba(OH)2 C. 0.25M HCN (K. = 5.00x10-10) d....
Analytical i. As the ionic strength, μ +0, activity coefficient, γ activity - The pH of a 3.22 x 102 M solution of Sr(OH)2 is ii. The activity coefficient of Fe3t at μ = 0.075 (aFe"-o9 nm) is Write the ACCURATE expressions for the equilibrium constants, K, for the reaction below in terms of activity coefficients and concentrations. v. CaF2(s) + 2 H2O() Ca2"(aq) + 2 HF (aq) + 2 OH (aq) v. Which of the following is the strangest...
What is the answer to question 15, 16, 17 and 18, and also how did you calculate it 15) (5 pts) equilibrium information below: Calculate the initial pH of the solution given the following reaction and Ca(OH)2(s) Ca+(aq) +20H-(ag) with Kso 1.3 x 105 A) 12.1 B) 11.8 C) 10.3 D) 8.2 E) None of these choices are correct 2x 13x6 (x) 2. 6.3x106 (x) 2 -0.0036 -10002 0.0072 16) (5 pts) How many moles of sodium acetate (conjugate base)...
Need help on questions 1-3 Henderson-Hasselbalch: pH=pka + Log( [base]/(acid] ) 1. The value of Ka of nitrous acid (HNO2) is 4.6 x 104 M. Calculate the pH and the concentration of [H3O+] in a 0.02M aqueous solution of HNO2(aq). 2. Label conjugate acid-base pairs: HNO2(aq) + H2O → H30* + NO2 (aq) 3. What will happen to the reaction equilibrium if we increase the pressure in the reaction vessel? H2(g) + 12(e) → 2 HI(g)
please please show the work and explinations! 4. K for the reaction Br2(g) 2Br(g) is 1.1 x 10 reaction at this temperature. at 1280°C. Calculate the value of K, for this (a) 1.1 x 10 (b) 18 (c) 0.14 (d) 910 (e) 8.3 x 10 5. Which of thg following reactions favors reactants? (a) H2(g)+ F2(g) 2HF(g ) K- 1.2 x 10 (b) 2NO(g)+ Cl:(g) 2NOCI (g): K= 4.6 x 10 cN:(g)+ Olg)= 2NO(g)K 4.7 x 1031 (d) 2NO(g) +O:(g)#...