Seawater at the surface has a pH of about 8.50. (a) Which of the following species has the highest concentration at this pH: H2CO3; HCO3−; CO32−? (b) What are the concentration ratios [CO32−]/[HCO3−] and [HCO3−]/[H2CO3] at this pH?
Seawater at the surface has a pH of about 8.50. (a) Which of the following species...
Calculate the pH and concentration of species present in a polyprotic acid solution.For a 3.44×10-3 M solution ofH2CO3, calculate both the pH and the CO32- ion concentration.H2CO3 + H2O → H3O+ +HCO3-Ka1 = 4.2×10-7HCO3- + H2O → H3O+ +CO32-Ka2 = 4.8×10-11pH =[CO32-] =
In waters affected by acid rain the concentrations of the three carbonic acid species (H2CO3, HCO3-, CO32-) are determined by concentration of the strong acid deposited by acid rain, as well as the concentration of H2CO3 which is controlled by the solubility of carbon dioxide . Under these conditions (constant H2CO3 and relatively low pH) the only carbonic acid equilbrium of importance is the conjugate base reaction of HCO3-, which is related to, but not identical to - and not...
11. which of the following pairs of species is a conjugate acid-base pair? a. NaF, F b. NHs, NH c. H30+, ОН- d. H2CO3, CO32 8. which of the following salts is most likely to form an aqueous solution having the pH <7? a. NaBr b. LiNO3 c. NH4CI d. RbCN 2. which of the following pairs of species is not a conjugate acid-base pair? a. OH, H b. HOCI, OCh c. HSO4,SO42 d. H2CO3, HCO3 11. which of the...
Need help with below Question. Citric acid (which we can abbreviate as H3Cit) is a triprotic carboxylic acid with the following acidity constants pKa1 = 3.128, pKa2 =4.761, and pKa3 = 6.396. a) A solution is made by adding lemon juice to water until the pH is 2.20. Assuming all the acidity is from dissociation of citric acid, find the total concentration of citrate species (i.e., TOTCit) and the concentration of HCit2-. b) The solution in part (a) is diluted...
Consider the following titration curve in which the weak base, CO32, is titrated with a solution of HCI: What is happening at point IV? HCI added (mt.) Select one or more: a. H2CO3 and HCO3- exist in equilibrium b. [H2CO3] = [HCO37] c. This is the equivalence point at which all CO32- has been neutralized d. The pH is equal to the pką of [HCO3-] e. (HCO3-] = [CO32-1
8. The normal pH of human blood is about 7.4. The carbonate buffer system in the blood uses the following reaction: CO2(+ 2H2O() H2CO3(aq) HCO3(aq) + H:04) The concentration of carbonic acid, H2CO3, is approximately 0.0012M and the concentration of the hydrogen carbonate ion, HCO3 is around 0.024M. Calculate the pH of blood
What is the pH of a 0.10 M solution of carbonic acid? Carbonic acid, H2CO3 has two acidic protons: H2CO3 + H2O7 HCO3 + H30+ Ka1 = 4.3x10-7 HCO3 + H202 CO32- + H30+ Ka2 = 5.6x10-11 a) 1.00 b) 0.70 c) 6.37 d) 3.68 e) I still can't figure this out...
Tutored Practice Problem 17.3.5 COUNTS TOWAIDA CHEE Calculate the pH and concentration of species present in a polyprotic acid solution. Close Problem For a 5.96X10 M solution of H2CO3, calculate both the pH and the Co, ion concentration. H2CO3 + H20= HCO3 + H20= H20* + HCO3 K1 = 4.2*10-7 H30* +CO;2- K2 -4.810-11 pH (CO3? Check & Submit Answer Show Approach Polyprotic Acid Titration Plots The pH plot for the titration of the diprotic acid maleic acid, HOC(CH), CO,H,...
Identify the chemical species in the carbonate system, and explain the significance of the system. Hence, on the bases of the following equilibria, determine the concentrations carbonate system species in a stream with a pH of 5.8. CO2(g) ↔ CO2(aq) KH = 3.4 x 10-2 mol L-1 atm-1; CO2(aq) + H2O ↔ H2CO3; Kr = 2 x 10-3 mol L-1 atm-1; H2CO3(aq) ↔ H+ + HCO3-; Ka1 = 4.47 x 10-7 M. HCO3- ↔ H+ + CO32-; Ka2 = 4.68...
Estimate the pH of natural rainwater, assuming the only substance effecting it is the adsorption of CO2 from the atmosphere. Assume the concentration of CO2 is 390 ppm, and the temperature and pressure are 25 "C and 1 atmosphere. Steps. Assume the absorption of CO2 adds only the carbonate system ions so the ionic present must balance, and are due to Ht, OH, HCO3, and CO32. Establish your charges charge balance equation-+'s = -'s i. Assuming the rainfall is slightly...