Question

The following kinetic data are collected for the initial rates of a reaction 2X + Z rightarrow products: What is the value of the rate constant with proper units? Express your answer to two significant figures and include the appropriate units. What is the reaction rate when the initial concentration of X is 0.68 M and that of Z is 1.38 M? Express your answer to two significant figures and include the appropriate units. Calculate the molar concentration of OH^- ions in a 8.3 Times 10^-2 M solution of ethylamine (C_2 H_5 NH_2) (K_b = 6.4 Times 10^-4). Express your answer using two significant figures. Calculate the pH of this solution. Express your answer using two decimal places.

Answer 1

A) 1(M) : C(M): E(M): 8.3×10-2 -x 8.3x10-2-x Baseionization constant of CH,NH2, K 6.4x10- CH.NH3OH [C,H,NH, Base ionizati on constant, 6.4x104 (8.3x10*-x) x 7.3x103 M From the equilibrium table, ГОН--: 7.3x10-3 M B)Thus,「H,0+1 = pH-log! H3O+ | =-log(1.4x10-12) = 11.86 1.0×10-14 7.3×10-3 1.4x10-12 M OH- 1-