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A 5.36 -g sample of $\mathrm{NH}_{4} \mathrm{Cl}$ was added to 25.0 $\mathrm{mL}$ of 1.00 $\mathrm{M}$ NaOH and the resulting solution diluted to 0.100 $\mathrm{L}$(a) What is the pH of this buffer solution?(b) Is the solution acidic or basic?(c) What is the pH of a solution that results when 3.00 $\mathrm{mL}$ of 0.034 $\mathrm{M} \mathrm{HCl}$ is added to the solution?

A. 8.78B. 8.77C. 8.78

Chemistry 102

Chapter 14

Acid-Base Equilibria

Liquids

University of Central Florida

Drexel University

University of Maryland - University College

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considered the falling reaction along with the equilibrium expression for this reaction, which is shown, it turns out, the equilibrium expression gives us the value off K. A equal bill in tow, 1.8 into tender, super minus five. We can calculate the moles off an edge for seal that is 0.1002 molds. The more off wish negative iron equals to 0.25 Hence the initial number off mole is also calculated as shown with the help of above data. Initial concentration can be calculated using the same formula. The initial and equilibrium concentration for this system is summarized into a tabular form over here. Now substitute the equation no substitute the equilibrium concentration into equilibrium expression on DDE 1.8 into Henry Super minus five for K A. Assume that zero point 2500 minus s is equally willinto 0.2500 on 0.7500 The 0.75 to 0 minus x gives us 0.750 substituting all the assumed values in the equation for K B. But it gives us the value off X equals 6.0 to 10 rate super minus six at equal at equilibrium, the concentration off hydroxide iron is calculated, which is 6.0 into 10. Bishop on minus six. The value off sewage is negative value of concentration, off which negative I knw. It gives us 5.2. We can calculate the total pH of solution by adding the P H and P, which values it gives US 8.78 for Part B. The pH value can be expressed the nature off solution, whether it is acidic or basic. If pH value is lesser than seven, it is acidic bile. If it is greater than seven, it is basic. Over here, the pH values 8.77 That is, it is a week basic for Part C. Given is the reaction along with the equally broom expression for the reaction which gives us the value of K equals 1.8 into 10. The super minus five, assuming the concentration off each positive as 0.1 for the next three, the number off more present would be 0.2 49 The number off more present for an itch for positive will be 0.751 violated the final volume off. New solution can be determined just by adding 0.100 well on 0.3 It gives US 0.103 Tito Consider the falling reaction for Option C along with equilibrium expression. Assuming that the moles off each positive is added, the concentration off EJ positive turns out to be 0.1 The concentration off in its 3.249 for image for 0.751 The final volume of Solution is 0.1030 Lito Okay, this is a long question. With the help off above data, we can calculate the initial concentration off honesty on damage for positive. The given table Summarize the initial concentration along with equilibrium and it's stage the Gaby No substitute the equilibrium concentration into equilibrium expression. We can get the value off X, which turns out to be 6.0 to 10 days from minus six. The value of X is less than 5% off solution, will you? Thus our assumption is valid hence at equilibrium concentration. The hydroxide ions can be calculated as 6.0 temperature minus six. File pH is negative off hydro hydroxide ion concentration That gives us five point to do the final pH is some off P, H and P, which which is 81 70.

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