13. Calculate the [H+], [OH-], pH and pKb of 0.370 M C2H5NH2Kb= 5.6 x 10-4
13. Calculate the [H+], [OH-], pH and pKb of 0.370 M C2H5NH2Kb= 5.6 x 10-4
Calculate the pH of a 0.51 M solution of C2H5NH3Cl (Kb for C2H5NH2 = 5.6 x 10-4). Record your pH value to 2 decimal places.
Calculate the pH of a 0.0415 M aqueous solution of ethylamine (C2H5NH2, Kb = 4.3×10-4). pH =
Find the [OH−] of a 0.44 M ethylamine (C2H5NH2) solution. (The value of Kb for ethylamine (C2H5NH2) is 5.6×10−4.) Express your answer to two significant figures and include the appropriate units.
2. A 35.00-ml sample of a 0.0870 M solution of ethylamine, C2H5NH2 (Kb = 5.6 x 10), is titrated with 0.150 M HCI. (a) What is the equivalence volume of HCI? (b) Calculate the pH of the solution: (1) prior to the start of the titration. (ii) after addition of 10.15 mL of the 0.150 M HCI. (iii) after addition of 14.50 mL of the 0.150 M HCI. (iv) after addition of 6.00 mL of the HCl beyond the equivalence...
Calculate the molar concentration of OH− ions in a 0.075 M solution of ethylamine (C2H5NH2; Kb=6.4×10−4). Express your answer to two significant figures.
250 mL of 0.200 M aqueous ethylamine (C2H5NH2(aq), Kb = 5.6 × 10–4) is titrated with 0.200 M HCl(aq). Which of the following indicators would be most appropriate for detecting the equivalence point of the above titration? The range of pH values for which each indicator undergoes a color change is given in parentheses. A. Crystal Violet (pH 0-1.8) B. 2,4-Dinitrophenol (pH 2.5-4.0) C. Eriochrome Black T (pH 5.0-6.5) D. m-Nitrophenol (pH 6.8-8.5) E. Alizarin yellow (pH 10.0-12.0)
Calculate the (OH) and the pH of a 0.023-M methylamine solution; Kb = 5.0 x 10". [OH-] =D pH =
If the Kb of a weak base is 5.6 x 10-4, what is the pH of a 0.450 M solution of this base? Give your answer to 2 decimal places
Calculate the [OH−] and the pH of a solution with an [H+]=3.7×10−13 M at 25 °C . [OH−]= M pH= Calculate the [H+] and the pH of a solution with an [OH−]=0.00076 M at 25 °C . [H+]= M pH= Calculate the [H+] and the [OH−] of a solution with a pH=5.41 at 25 °C . [H+]= M [OH−]= M
Calculate the [OH-] and the pH of a solution with an [H+] = 4.8 x 10-6 M at 25 °C.Calculate the [H+] and the pH of a solution with an [OH-] = 8.8 x 10-13 M at 25°C. Calculate the [H+] and the [OH-] of a solution with a pH = 11.04 at 25°C.