Chapter 4, Problem 4.19QAP

Be sure to answer all parts. Calculate the hydroxide ion concentrations of the following solutions at 25°C, given the pOH. (a) pOH= 8.89 x 10 M |-[_HO] (Enter your answer in scientific notation.) (b) рОН - 4.52 M -[ HO] < Prev 15 of 28

Write the K₂ expression for an aqueous solution of hypochlorous acid: (Note that either the numerator or denominator may contain more than one chemical species. Enter the complete numerator in the top box and the complete denominator in the bottom box. Remember to write the hydronium ion out as H³O+, and not as H†) Ka ||

1.What is the pH of 0.400 M ammonia soln? (Kb = 1.8 x 10-5) (Round-off your answer to two decimal place)   2.Predict the direction of the following reactions in aqueous solution: Write FORWARD (if the shift is from left to right)or BACKWARD (if the shift is from right to left)   HF (aq)+ HCOO-(aq) ↔ HCOOH (aq) + F-(aq)

Consider the dissociation of hydrocyanic acid in aqueous solution HCN - CN + H* for which K, is 4.9 x 101°. (i) Find the pH of a solution initially 102 M in HCN, and the degree of dissociation of the HCN, a. (ii) To this solution is added more CN' until [CN'] = (0.1 M. What is the new pH of the solution? (ii) Without making a new numerical cakculation, explain qualitatively how the degree of dissociation would change if the solution is diluted.

Calculate the p-value for each of the indicated ions Na+, Cl- and OH- in a solution that is 0.0585 M in NaCl and 0.0846 M in NaOH H+, Cl- and Zn2+ in a solution that is 0.967 M in HCl and 0.234M in ZnCl2.

Polymers are not very soluble in water, but their solubility increases if they have charged groups. (a) Case in, a milk protein,contains many —COO⁻ groups on its side chains. How does the solubility of casein vary with pH? (b) Histones are proteins es-sential to the function of DNA. They are weakly basic due to the presence of side chains with —NH2 and =NH groups. How does the solubility of a histone vary with pH?

(a) Calculate the percent ionization of 0.125 M lactic acid(Ka = 1.4 x10-4 ). (b) Calculate the percent ionization of0.125 M lactic acid in a solution containing 0.0075 M sodiumlactate.

A solution is prepared at 25 °C that Is initlally 0.43M in dimethylamine ((CH, NH, a weak base with K, =5.4x10, and 0.15M in dimethylammonlum -4 and 0.15M In dimethylammonium bromide ((CH,),NH,Br) ((CH,) NH,Br). Calculate the pH of the solution. Round your answer to 2 decimal places. bгomide 2. pH Explanation Check 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privac hp

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.