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Chapter 7: Q106E (page 240)

Question: Calculate the concentrations of all species present in a 0.25 M solution of ethylammonium chloride (C2H5NH3Cl).

Short Answer

Expert verified

Answer

Concentrations of all species present ina 0.25 M solution of C2H5NH3Cl

Step by step solution

01

C2H5NH3Cl Dissociation 

C2H5NH3Clis a salt of strong acid HCl and weak base C2H5NH2.

Thus, the base hydrolyses:

The H3O+ ion so produce, make the solution acidic.

02

Concentration Calculation of Various Species 

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Most popular questions from this chapter

Question:Write the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water.

a. HCN

b. HOC6H5

c. C6H5NH3

Write balanced equations that describe the following reactions.

a. The dissociation of perchloric acid in water.

b. The dissociation of propanoic acid (CH3CH2CO2H) in water.

c. The dissociation of ammonium ion in water

Calculate [CO32-] in a 0.010 Msolution of CO2 in Water (H2CO3). If all the CO32- in this solution comes from the reaction

HCO3−(aq)⇔H+(aq)+CO32−(aq)

What percentage of the H+ ions in the solution is a result of the dissociation of HCO3- ? When acid is added to a solution of sodium hydrogen carbonate (NaHCO3), vigorous bubbling occurs. How is this reaction related to the existence of carbonic acid (H2CO3) molecules in aqueous solution?

Question:The measurement of pH using a glass electrode obeys

the Nernst equation. The typical response of a pH meter

at 25.008C is given by the equation %meas 5 %ref 1 0.05916 pH

where %ref contains the potential of the reference electrode

and all other potentials that arise in the cell that are not related to the hydrogen ion concentration. Assume that %ref 5 0.250 V and that %meas 5 0.480 V.

a. What is the uncertainty in the values of pH and [H1]

if the uncertainty in the measured potential is 61 mV

(60.001 V)?

b. To what accuracy must the potential be measured

for the uncertainty in pH to be 60.02 pH unit?

Question: Calculate the pH of a 5.0 × 10-3 M solution of H2SO4.
See all solutions

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