Question

5. Which one of the following conditions is always TRUE for a titration of a WEAK ACID with a STRONG BASE? a. A colored indicator with a pka less than 7 should be used. b. Equal volumes of weak acid and strong base are required to reach the equivalence point. c. The equivalence point occurs at a pH equal to 7. d. The equivalence point occurs at a pH greater than 7. 6. Consider the following equilibrium process between dinitrogen tetrafluoride (N,FA) and nitrogen difluoride (NF): N.F.(g) <-> 2 NF (8) Predict the change in equilibrium If the pressure on the reacting mixture is INCREASED at constant temperature. a. Left to Right b. Right to left c. No change d. Concentrations of both gases increase 7. Which one of the following salts would produce an acidic solution when dissolved in water? a. KI b. NHECI C. KClO4 d. NaCN 8. A Bronsted-Lowry BASE is defined as: a. Can donate a proton b. Can accept a proton C. Can accept an electron pair d. Can donate an electron pair 9. A solution of NaOH is standardized with potassium acid phthalate (KHP), KHC,H,O.. molar mass = 204 g/mol. If 2.550 g of KHP is titrated with 54.50 mL of the NaOH solution, what is the molarity of NaOH?

please explain how you got your all your answers

Answer 1

a The titration - strong base curve of weak acid and is f equivalence point so in this titration Equivalence point is always at more than 7 por so option d is correct b Ma Fu 2N Ez (g) If pressure is increase the equilibrium will shift in that direct where the no of mole are decrease. In forward reaction no of mole are increasing out in back ward directions no of mole are decreasing so equilibria will shift right to left option b

(0 KI + H2O - KOH + H2 Strony weak base acid stamme 1 (2) Nohlad + to Malyou t Hell weak base (3) kelou +20 - Kon thlon Strong strong base aciq. W NOCN ho naoH THEN a stang weak - base so option bora is correct. acid. - According to Bronsted - Lowry acid base theory an acid donate proton and base accept the proton. so option b is correct.