Urea (NH2CONH2) is a component of urine. It is a veryweak base, having an estimated pKb of 13.8 at room temperature.(a) Write the formula of the conjugate acid of urea.(b) Compute the equilibrium concentration of urea in asolution that contains no urea but starts out containing 0.15 mol L-1of the conjugate acid of urea.

(a) Hydrogen peroxide, H2O2, is a Brønsted Lowry acid. It is used as an antiseptic and bleaching agent. Write the formula for the conjugate base of hydrogen peroxide.   (b) Hydrazine, N2H4, is a Brønsted-Lowry base used as a rocket fuel. Write the formula for the conjugate acid of hydrazine.   (c) Phenol, HOC6H5, is a Brønsted-Lowry acid used to make plastics, nylon, and slimicides. Write the formula for its conjugate base.   (d) Aniline, C6H5NH2, is a Brønsted-Lowry base used to make polyurethane. Write the formula for its conjugate acid.

The Ka of a weak acid is 3.33 x 10-5, what is the pKb of it's conjugate base?

. (a) Combine the following equations to construct an acid-base reaction equation, in the process drawing complete Lewis structures for both reactants and products, along with arrows to show the movement of nonbonded electrons. (b) Predict the overall direction of equilibrium in your equation and justify your answer. (c) Calculate the pK, values for the conjugate bases of the acids in your equation. NH t H20 H30® CHy Cita OH +Ho 1300 + CHzchb0s pka =15:9 + NH3 pkw =9.24

Identify the acid, base, conjugate acid and conjugate base in the following reactions: HF (aq) + H,O (1) H;O* (aq) + F ¯(aq) CH;CH,NH, (aq) + H,O (1) CH;CH,NH;" (aq)+OH (aq)

نقطتان )2( The pH of a 1.00 M Solution -1 of Nitrous acid HNO2 (pKb =10.6) is

Predict whether aqueous solutions of the following substances are acidic, basic, or neutral and write hydrolysis equations for the acidic and basic solutions. (a) CsBr;  (b) Al(NO3)3;  (c) KCN;  (d) CH3NH3Cl

Abbreviating malonic acid, CH2(CO2H)2, as H2M, find the pH and concentrations of H2M, HM, and M2 in each of the following solutions: (a) 0.100 M H2M; (b) 0.100 M NaHM; (c) 0.100 M Na2M. For (b), use the approximation 3HM24 < 0.100 M.

For the following acid-base reaction, (1) predict the products, showing both reactants and products complete Lewis structures and arrows showing electron flow; (2) label each structure with the lowing: Bronsted acid, Bronsted base, conjugate acid, conjugate base; (3) give a brief definition of a ronsted acid and Bronsted base; (4) predict the direction of the equilibrium and justify your answer. HC0OH + CH3 Nta PRん106Y pkb = 3.36

CH3CH2CO2H , Ką = 1.3 x 105 CH3CH2CO2 , Kp = 7.7 x 10-10 F, Kp = 1.4 x 10-11 HF , Ką = 7.2 x 10-4 For the reaction between propanoic acid (CH3CH2CO2H) and a solution containing fluoride ions (F"): (a) The name of the conjugate base produced is (b) The name of the conjugate acid produced is (c) The reaction is favoured (write 'reactant' or 'product'), because the reactants are the (write 'weaker' or 'stronger') set of acid and base.