Q2 At 291 K, the equivalent conductivities at infinite dilution of HCI, NaCl and CH3COONA are 369.3, 101.7 and 71.7 S cm2 eq-1 respectively. If equivalent conductivity of centinormal solution of acetic acid is 14.3 S cm2 eq-1, Calculate of the degree of dissociation (in %) of CH3COOH ?
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- The molar conductivity of 0.020 M HCOOH(aq) is 3.83 mS m2 mol-1. What is the value of pKa for formic acid?Q 1. At 291 K, the equivalent conductivities at infinite dilution of HCI NaCl and CH3COONA are 369.3, 101.7 and 1.7 S cm2eq-1 respectively. If equivalent conductivity of centinormal solution of acetic acid is 14.3 S cmzeq 1, [H+] in solution of acetic acid is Xx10 . Calculate of Value of X?9. The molar conductivity values at infinite dilution, in units of Sm?mol1, of NHẠCI, NaCl and N2OH are 1.497 x 10², 1.2645 x 10² and 2.478 x 10², respectively. (a) Calculate the molar conductivity at infinite dilution of NH4OH. (b) The molar conductivity of 0.0100 moldm3 NH,OH is 1.13 x 103 Sm?mol. What is the degree of dissociation and the dissociation constant, Kp, of 0.0100 moldm3 NHẠOH?
- Q 1. At 291 K, the equivalent conductivities at infinite dilution of HCl „NaCl and CH3COONA are 369.3, 101.7 and 1.7 S cm2eq-1 respectively. If equivalent conductivity of centinormal solution of acetic acid is 14.3 S cm2eq-1, [H+]in solution of acetic acid is Xx104. Calculate of Value of X?To determine the enthalpy change for a reaction at a different temperature using the equation, A H(T₁T₂) = [¹²C (1) a (T) dT, one must 1 1 evaluate the change in the value of H for each of the reaction species substitute the results in the the van't Hoff equation for the two temperatures T₁ and T2 O first evaluate the change in reaction Gibbs energy assume that the heat capacity is constant over the temperature rangeThe equivalent conductance of a 0.0140N solution of chloroacetic acid is 109.0 at 250C. What is the ionization constant (Ka) of chloroacetic acid?
- The mean activity coefficient in an 0.050 molKg-1 LaCl3 (aq) solutions is 0.303 at 25 o C. What is the percentage error in the value predicted by the debye – Huckel limiting law?The conductivity of a 0.0312 M solution of a weak base is 1.53 x 104 Scm'. If the sum of the limiting ionic conductances for BH* and OH-' is 237.0 Scm²mol·' what is the value of the base constant K6? 4.5 x 10s mol.dm (i) 2.3 x 103 mol.dm (iii) 2.89 x 10 mol.dm3 (ii) 1.37 x 10-5 mol.dm3 (iv) (v) 4.78 x 103 mol.dm3Calculate the ionic strength of a solution that is 0.10 molKg-1 in KCl (aq) and 0.20 molKg-1 in CuSO4 (aq)
- The mean activity coefficients of HBr in three dilute aqueous solutions at 25 °C are 0.930 (at 5.0 mmol kg-1), 0.907 (at 10.0 mmol kg-1), and 0.879 (at 20.0 mmol kg-1). Estimate the value of B in the Davies equation.Calculate the ionic strength of a solution that is 0.15 mol kg-1 in KCI(aq) and 0.30 mol kg-1 in CuSO4(aq).The molar conductivity of a saturated solution of thallium (1) bromide at 20°C is 2.158 x 102 Som¹ and that of pure water is 4.44 x 105 S m¹. The molar conductivity at infinite dilution is 138 S cm² mole-¹. Calculate the solubility of thallium (1) bromide in grams per liter.