[C8H5O4-] = (Ka1*[C8H6O4])1/2 = (10-3.51*0.15)1/2 = 0.00681 M or 6.81*10-3 M
[C8H2O42-] = (Ka2*[C8H5O4-])1/2 = (10-4.82*0.00681)1/2 = 3.21E-4 M
Now, [H+]total = 6.81*10-3 M + 3.21*10-4 M = 7.13*10-3 M
Now, pH = -Log[H+]total = -Log(7.13*10-3) = 2.15
Question 2 Terephthalic C8H604) is a diprotic acid with pka's 3.51 and 4.82. a. What is...
Terephthalic (C8H6O4) is a diprotic acid with pka's 3.51 and 4.82. a. What is the pH of a 0.15M solution of this acid? (write answer to hundredths place) b. What is the concentration of C8H4O4-2 in a 0.15 M solution of this acid? (write answer to three significant figures and use "E" to write exponent) Terephthalic C3H604) is a diprotic acid with pka's 3.51 and 4.82. a. What is the pH of a 0.15M solution of this acid? ( write...
Terephthalic (C8H6O4) is a diprotic acid with pka's 3.51 and 4.82. a. What is the pH of a 0.15M solution of this acid? [x1] ( write answer to hundredths place) b. What is the concentration of C8H4O4-2 in a 0.15M solution f this acid? [x2] ( write answer to three significant figures and use "E" to write exponent) I think (a) pH is 2.18 but I need concentration.
Question 5 A solution of 0.05M hexanoic acid is prepared. Ka = 1.41x10-5 a. What is the pH of the solution? (write answer to the hundredths place) b. What is the % ionization of the solution? ( write answer to the hundredths place) A Click Submit to complete this assessment.
Diprotic acid (H2A), Part II (Homework) Homework. Unanswered For carbonic acid, Kail = 4,5 x 10-7. What is the (HCO3-) in a 0.10 M carbonic acid solution? Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimale.g, 2.5E5 for 2.5 x 10" Numeric Answer: Unanswered * Submit Diprotic Acid (H2A), Part 1 (Homework) Homework . Unanswered For carbonic acid, Kal = 4.5x 10-7. What is the pH of a 0.10...
Question 6: (1 point) Selenous acid, H2SO3, is a diprotic acid with pKa,1 = 2.64 and pKa,2 = 8.26 at 25 °C. For 0.169 mol L-1 H2SeO3(aq) at 25 °C, calculate: (a) the fraction, at, of H2SeO3 that exists in the singly-ionized form, HSEO3- ay = (Enter a number between 0 and 1, accurate to 2 significant figures.) (b) the equilibrium concentration of the doubly-ionized form, Se032- [SeO32-leq = _ (Enter a number accurate to 2 significant figures.) mol L-1...
A solution of 0.05M hexanoic acid is prepared. KA = 1.41x10-5 a. What is the pH of the solution? (write answer to the hundredths place) b. What is the % ionization of the solution? (write answer to the hundredths place)
Hydroselenic acid, H2Se, is a diprotic acid with pKa,1 = 3.89 and pKa,2 = 11.01 at 25 °C. For 0.147 mol L−1 H2Se(aq) at 25 °C, calculate: (a) the fraction, α1, of H2Se that exists in the singly-ionized form, HSe− α1 = (Enter a number between 0 and 1, accurate to 2 significant figures.) (b) the equilibrium concentration of the doubly-ionized form, Se2− [Se2− ]eq = mol L−1 (Enter a number accurate to 2 significant figures.) (c)...
What is the pH of a 0.02 M solution of potassium benzoate solution (K+ -OOCC6H5). The pka of benzoic acid is 4.19. (Write answer to the hundredths place). What is the pH of a 0.02M solution of potassium benzoate solution (K+ -OOCC6H5). The pka of benzoic acid is 4.19. (Write answer to the hundredths place)
For 0.030 MM H2CO3H2CO3, a weak diprotic acid, calculate the following values. Use ionization constants of H2CO3H2CO3: K1=4.4×10−7,K2=4.7×10−11 K1=4.4×10−7, K2=4.7×10−11, as necessary. A) [H3O+][H3O+] Express your answer using two significant figures. B) [HCO−3][HCO3−] Express your answer using two significant figures. C) [CO2−3][CO32−] Express your answer using two significant figures. pH of diprotic weak acid is not given?
Suppose you perform a titration of a diprotic acid and you determine the following information: pH at first equivalence point: 4.15 pH at second equivalence point: 8.12 pH at first half-equivalence point: 2.22 pH at second half-equivalence point: 6.73 What is pKa2 for this unknown acid? Enter your answer numerically to three significant figures.