Multiple ChoiceDetermine the pH of 0.250 M sodium phosphate, Na3PO4. Phosphoric acid, H3PO4, contains Ka1 = 7.5 × 10−3, Ka2 = 6.2 × 10−8 and Ka3 = 4.2 × 10−13.225views2rank
Multiple ChoiceDetermine the pOH of 0.450 M citric acid, H3C6H5O7. It possesses Ka1 = 7.4 × 10−4, Ka2 = 1.7 × 10−5 and Ka3 = 4.0 × 10−7.276views3rank1comments
Textbook QuestionCalculate the [H3O+] and pH of each polyprotic acid solution. a. 0.350 M H3PO42886views
Textbook QuestionA 40.0 mL sample of a mixture of HCl and H3PO4 was titrated with 0.100 M NaOH. The first equivalence point was reached after 88.0 mL of base, and the second equivalence point was reached after 126.4 mL of base. (e) Sketch the pH titration curve, and label the buffer regions and equivalence points.87views
Textbook QuestionThe acidity of lemon juice is derived primarily from citric acid (H3Cit), a triprotic acid. What are the concentrations of H3Cit, H2Cit-, HCit2-, and Cit3- in a sample of lemon juice that has a pH of 2.37 and a total concentration of the four citrate-containing species of 0.350 M? <IMAGE>105views
Textbook QuestionCitric acid, which is present in citrus fruits, is a triprotic acid (Table 16.3). (a) Calculate the pH of a 0.040 M solution of citric acid. (b) Did you have to make any approximations or assumptions in completing your calculations? (c) Is the concentration of citrate ion 1C6H5O7 3-2 equal to, less than, or greater than the H+ ion concentration?1658views
Textbook QuestionA 7.0 mass % solution of H3PO4 in water has a density of 1.0353 g/mL. Calculate the pH and the molar concentrations of all species present (H3PO4, H2PO4-, PO43-, H3O+ , and OH-) in the solution. Values of equilibrium constants are listed in Appendix C.514views1rank