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Chemistry
- Calculate the ionization constant for each of the following acids or bases from the ionization constant of its conjugate base or conjugate acid:(a) F−(b) NH4+(c) AsO43−(d) (CH3)2 NH2+(e) NO2−(f) HC2 O4− (as a base)arrow_forwardShow by suitable net ionic equations that each of the following species can act as a Brønsted-Lowry base:(a) HS−(b) PO4 3−(c) NH2 −(d) C2H5OH(e) O2−(f) H2 PO4 −arrow_forwardEven though both NH3 and C6H5NH2 are weak bases, NH3 is a much stronger acid than C6H5NH2. Which of the following is correct at equilibrium for a solution that is initially 0.10 M in NH3 and 0.10 M in C6H5NH2? (a) [OH]=[NH4+] (b) [NH4+]=[C6H5NH3+] (c) [OH]=[C6H5NH3+] (d) [NH3]=[C6H5NH2] (e) both a and b are correctarrow_forward
- Which acid is the weakest? (A) HCN (K, = 4.9×10-10) (B) HOCI (K, = 3.5×10 8) (C) HNO2 (K, = 4.5×104) (D) CH;COOH (K, = 1.8×10-5)arrow_forwardIdentify and label the Brønsted-Lowry acid, its conjugate base, the Brønsted-Lowry base, and its conjugate acid in each of the following equations:(d) H2 PO4− + OH− ⟶ HPO42− + H2 O(e) H2 PO4− + HCl ⟶ H3 PO4 + Cl−(f) [Fe(H2 O)5(OH)]2+ + [Al(H2 O)6]3+ ⟶ [Fe(H2 O)6]3+ + [Al(H2 O)5(OH)]2+(g) CH3 OH + H− ⟶ CH3 O− + H2arrow_forwardShow all work. Please 1) Write equations that show H2PO4− acting both as an acid and as a base. 2) Calculate the pH and the pOH of each of the following solutions at 25 °C for which the substances ionize completely: (a) 0.200 M HCl (b) 0.0143 M NaOH (c) 3.0 M HNO3 (d) 0.0031 M Ca(OH)2 3)Propionic acid, C2H5CO2H (Ka = 1.34 × 10−5), is used in the manufacture of calcium propionate, a food preservative. What is the hydronium ion concentration in a 0.698-M solution of C2H5CO2H?arrow_forward
- Calculate the pH of a solution when the following quantities of 0.7500 M KOH are added to 60.00 ml of 0.2500 M HNO2. Ka = 7.1 x 10-4 (a) 0.00 ml (b) 15.00 ml (c) 20.00 ml (d) 25.00 mlarrow_forwardWhich of the following statements is true? (Select all that apply.) In an acid solution, K₂ = [H3O*]. Consider 1.0 M acidic solutions of the imaginary acids, HA, HB and HC and the 1.0 M salt solutions NaA, NaB, and NaC. If HA has the lowest pH, then 1.0 M NaA would have the highest pH. Ka of an acid multiplied by the Kb of its conjugate base equals Kw. The stronger the base, the weaker its conjugate acid. None of these are true.arrow_forward9. Identify and label the Brønsted-Lowry acid, its conjugate base, the Brønsted-Lowry base, and its conjugate acid in each of the following equations: (a) HNO3 + H₂O → H3O+ + NO3 (b) CN + H₂O →→→ HCN + OH¯ (c) H₂SO4 + CIT HCI + HSO4 (d) HSO4 + OH- SO4²- + H₂O (e) 0²- + H₂O → 20H- (f) [Cu(H₂O)3(OH)] + + [Al(H₂O)61³+ · [Cu(H₂O)4]²+ + [Al(H₂O),(OH)]²+ (g) H₂S + NH₂¯ → HS¯+ NH3arrow_forward
- Determine the pH of the solution resulting from mixing a solution of 154 mL of HNO2 (Ka = 5.62e – 04) at a 1.800 M concentration, with 115 mL of a 1.400 M solution of C'sOH ? O (a) 3.250 O (b) 1.696 O (c) 3.392 O (d) 3.192 O (e) 0.308arrow_forward23 What is the pH of a solution composed of 0.20 M NH3 and 0.15 M NHẠCI? (Kb NH3 = 1.8 x 10*) (a) 2.15 (b) 4.62 (c) 8.26 (d) 9.38arrow_forwardTyped and correct answer pleasearrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax