Answer is a).
Because only weak acid or base can be used for the preparation of buffer with their salts. In a), H2SO4 is a strong acid which can't be used for the preparation of buffer.
de cre quilibrium constant will Which of the following combustions is not suitable for making a...
Which of the following pairs is suitable for making a buffer solution? Select one: O a. CH3COOH and HCOOH Вь b. H2S and H2SO4 O c. Na2SO4 and H2SO4 O d. H3PO4 and NaH2PO4 Oе. NH4Cl and NH4OH
10. Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8? A) CHCO02Na / CH3COOH (Ka 1.8 x 10) NH3/NH4CI (K-5.6 x 10-10) в) NaOCl/HOCI (K= 3.2 x 10-) C) NaNO2 / HNO2 (Ka= 4.5 x 104) D) NaCl/HCI E)
ESNH4+ Which of the following is the most value o buffer system for at a) H₂CO3/HCO₃- (Kar for H₂CO₃ is 4.3 €) b) HCO3- I CO 2 (kaz for H 2 CO 3 is 4. 8e") c) H₂S/HS (kai for H₂S is 8.9 € -8) d) HC ₂0 4 / Cz O4 2- (kaz for H₂CO is s.de-s) e) H ₃ PO 4 / H₂ PO 4 (ka, for H3PO4 is 6.9x103)
1) Which of the following pairs would make suitable buffers? For each pair that does not, indicate why. (4 points) a) HS/HS b) HBr/Br c) NH4+NH, d) HC204/C2012- e) CH3NH,*/HS f) HNO/NO2 g) H2SO./HSO4 h) HF/Br 2) Which of the following pairs would make suitable buffers? For each pair that does not, indicate why. (3 points) a) 0.1 L of 1 M NH4 and 1 L of 1 M NH b) 0.1 L of 0.1 M HCL of 1 M...
(c) A slightly ionized compound, usually water 2. Write the equation for the decomposition of sulfurous acid. H₂SO₄ (aa) H2O(e) + SO2 (9) 3. Using three criteria for double displacement reactions, together with the se Table in Appendix 5, predict whether a double displacement reaction will occur example below. If reaction will occur, complete and balance the equation, prope cating gases and precipitates. If you believe no reaction will occur, write "no read the right-hand side of the equation. All...
please explain 3,4,and 5 thanks Diassociate 3. Which of the following is not a conjugate acid-base pair? a. H2SO4, SO4 b. HNO3, NO3 c. HC2H302, C2H302 d. H2PO4 , HPO4 e. HBr, Br 4. Which of the following is a conjugate acid-base pair? a. HNO3, H2NO3 b. HNH, NH, c. H F, HF d. HPO,2,PO e. HCN, CN 5. Choose the case that is not a Bronsted conjugate acid-base pair. a. CH3NH3", CH3NH2 b. HCN, CN c. HCIO, CIO2 d....
CHEMIOS CHAPTERS 34 EXAMA 9. Complete combustion of a 0.70-mal sample of a hydrocarbon. C gives 3.50 mal of C0, and 2.80 mol of H.O. The molecular formula of the original hydrocarbon is a. Cal h. Ch. c. Cli, d.Cls. &. C.H. 10. Aspirin is produced by the reaction of cylicid =138.1 mol and acetic anhydride (N=102.1 ml C-H40, 5) +C ,0 4,ỄN - CH 40 (8) + C3H40, 4) If 2.04 g of C O - 189.2 g/mol) is...
5) For a particular chemical reaction it is found that the value for the equilibrium constant for the reaction decreases as temperature increases. Based on this we can conclude a) AH>0 b) AH® < 0 c) AS > 0 d) AS 0 e) AG < 0 6) When 0.0100 moles of dimethyl amine ((CH3)2NH) is added to 1.000 liters of water, the pH of the water increases above the value pH = 7.0 found for neutral solutions. Based on this,...
NAME: 1. Which net ionic equation best represents the reaction that occurs when an aqueous solution of barium chloride is mixed with an aqueous solution of lithium sulfate? a. 2H'(ag)+2C(aq)2HC(g) b. Ba (ag)+ SO (aq)- BaSO (s) c. Ba(aq)+ 2Cl (ag)+ 2Li'(ag)+ SO (ag) BaSO4(s)+2LIC((ag) d. BaCl(ag)+ LiSO4(ag) BaSO (s)+ 2LICI(ag) e. No net reaction occurs. 2. What products result from mixing aqueous solutions of Ni(C;H3O2)2(aq) and K3PO (aq)? a. Ni PO(s) and Ka(C2H,O2)2 (aq) b. Nis(PO):(s) and KC2H,O:(s) c....
35% l T-Mobile 2:26 AM Not Secure - mychemistryprofcom 1.Which compound is insoluble in water? a. NaCO b. NH,NO, c. CaCO, d. CaCI, e. LiCIO 2. What is the net ionic equation for the reaction between HCl and NaHCO,? a. H.CO,(aq) HO+CO (g) b. HCl(a)HCO,(aq) H,0+ CO.(g) d. H,O +CO.(g) H'(aq) + HCO, (aq) e.H(aq) NaHCO,(aq) Na (aq) + H,O+CO (g) 3. What is the net ionic equation for the reaction between HNO and Na SO,? a H,SO,(aq) H,0+SO.(g) b....