6. On the diagram at the right of titration of a weak acid by a strong...
EQUL 499- Det. Of pH of Strong Acid, weak acid, salt, and buffer solution Discussion Topics Discussion Topics (need to submit in Blackboard): 1. What is a buffer? • A buffer is a solution that, when introduced to a new environment, undergoes minimal pH change, typically when adding acidic or basic solutions. These are extremely important for life because the pH of human blood is delicate and even if it is changed by 0.1, there may be catastrophic effects. 2....
H3PO4 can be classified as a Select one: O a strong acid O b. weak acid O c. strong base O d. weak base NH3 can be classified as a Select one: a strong acid O b. weak acid O c. strong base O d. weak base HNO3 can be classified as a Select one: a strong acid O b. weak acid O c. strong base O d. weak base HCl can be classified as a Select one: O a...
5,6,7 5. An example of a Lewis acid which is NOT also acting as a HBronsted acid is (see species in bold) A. 2H20-H0'+OH B. HCI NaOH NaCl H20 C. BHs NHs->BHNH D. NHs H0NH+OH 6. On the diagram at the right of titration of a weak acid by a strong base, what is represented by the point A? A. the 50:50 bufler mixture B. the stoichiometric point C. mL added base D. the buffer zonc E. solution of strong...
LIUserIUDI Tulured Practice PIUDIM 17.3.3 COUNTS TOWARDS GRADE Calculate pH for a weak base/strong acid titration. Determine the pH during the titration of 33.9 mL of 0.300 M ethylamine (C2H5NH2 , Kb = 4.3x104) by 0.300 M HBr at the following points. (a) Before the addition of any HBr (b) After the addition of 14.7 mL of HBr (c) At the titration midpoint (d) At the equivalence point (e) After adding 52.5 mL of HBr
36) Which one of the following is not a strong acid? (or a weak electrolyte?) a) HNO )HCI HI )HF e) HCIO Answer: 37) The is the conjugate species that remains after an acid donates a proton is called its conjugate base. What base of the hydronium ion, HO? B)HO C)HO D)H E HO'has no conjugate base. Answer: acid-base pair? 38) For the reaction shown below, which of the following is a conjugate acid A)CHsN, H:0 B) CsH,N, CsH,NH' C)...
1. The following pictures represent solution at various points in the titration of a weak acid with a strong base. HA + OH - HOH + A OH - -OH Which picture to the left corresponds to cach of the following points in the titration? before the addition of any NaOH at the equivalence point where only a salt remains which solution is a buffer? Multiple Choice 1. Barium hydroxide is slightly soluble in water, with a Kap of 5.00...
9. Classify each substance as a strong acid (SA), weak acid (WA), strong base (SB), or weak base (WB). Then calculate the pH and % ionization. a. 1.0 M HC,H,O, d. 0.01 M HC,H,O b. 0.25 M HC,H,O c. 0.1 M HC,H,0, 9. Classify each substance as a strong acid (SA), weak acid (WA), strong base (SB), or weak base (WB). Then calculate the pH and % ionization. a. 1.0 M HC,H,O, d. 0.01 M HC,H,O b. 0.25 M HC,H,O...
13) A 0.0035 M aqueous solution of a particular compound has pOH 11.54. The compound is a) a weak base b) a weak acid c) a strong base a strong acid e) a salt 14) In basic solution, a) [H30'> [OH] b) [H30 ]- [OH1 [Hs0)< [OH] d) (OH]<7.00 e) [OH] =OM 15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBro, at 25°C is 4.17. What is the value of K for HBro? a2.0 x 10...
Strong base is dissolved in 765 mL of 0.400 M weak acid (Ka = 4.23 × 10-5) to make a buffer with a pH of 4.19. Assume that the volume remains constant when the base is added. Strong base is dissolved in 765 mL of 0.400 M weak acid (Ka 4.23x 10) to make a buffer with a pH of 4.19. Assume that the volume remains constant when the base is added. HA(aq) + OH-(aq) → H2O()-A-(aq) Calculate the pKa...
Classify HCIO as a strong base, weak base, strong acid, or weak acid, and then answer the following question. What is the pH of a 0.07 M HCIO (aq) solution? a. 1.2 b. 8.7 C. 4.3 d. 9.7 e. 5.3