Question

if you could check to see if my answers were correct and help me solve the one that arent it would be very much apritiated thank you :)

Which of the following solutions would have the highest pH? Assume that they are all 0.10 Min acid at 25°C. The acid is followed by its ka value. a. HOCI, 2.9 x 10* HOLIH O 6. HC,H,O, 1.3 * 101 C. HNO, 4.6 x 10 d. HCHO, 1.8 * 109 e. HCIO, 1.1 x 10 Define dynamic equilibrium. a. no reactants react b. no products are formed C. the rate of the forward reaction is faster than the rate of the reverse reaction d the rate of the reverse reaction is faster than the rate of the forward reaction the rate of the forward reaction equals the rate of the reverse reaction 3. Consider the following reaction and its equilibrium constant 6.43 SO 9) + NO,(9) SO.(0) + NO(g) K = 0.33 A reaction mixture contains 0.49 M SO. 0.14 M NO, 0.12 M SO, and 0.14 M NO. Which of the following statements is TRUE concerning this system? a. The reaction will shift in the direction of reactants. b. The equilibrium constant will decrease. The reaction will shift in the direction of products. The reaction quotient will decrease. The system is at equilibrium. a.) 000 Define buffer capacity. Buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. Buffer capacity is the amount of acid that can be added until all of the base is used up Buffer capacity is the amount of base that can be added until all of the acid is used up Buffer capacity is the amount of acid that can be added until all of the acid is used up. Buffer capacity is the amount of base that can be added until all of the base is used up 1.28 Calculate the pOH of a solution that contains 4.8 x 10-6 M OH at 25°C. b. 5.32 -log 4.8x10.16 8.68 4-5.318 8.167 10.64 9.64 Page 3 of 11

Answer 1

1. We know higher Ka = Strong acid → Low pH. for highest pH we need weak Acid lower Ka :. B Correct option Chas cleast Ka Value) 2) Dynamic equilibrium rate of forward reaction = rate of backward @ Correct 3) Soz + No₂ = Soz + No Qc = [soz?? No] = (0.12(0.14) [so,] [no] (0.49) (0.14) Qc = 0.245 Ke=0.33 : Qck ke

& equilibrium will shift in forward direction option correct (4) Buffer capacity is defined as anorent of acid or base added without destroying effectiveness. option- Al correct 5 POH = -log[on] 4.8 X100M > OH poH = -log (4.8x106) pOH = 5.318 F[0.6812-6] 5.32 I logg. 8) pol= 5.22 option -B > Correct Note: You have done wrong calculation. Kindly rectify it