/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q19.18P Find the pH of a buffer that con... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 19: Q19.18P (page 873)

Find the pH of a buffer that consists of 0.12M boric acid (H3BO3) and 0.82M sodium borate(NaH2BO3) (pKaof boric acid=9.24)?

Short Answer

Expert verified

The pH value of the given solution is 10.07.

Step by step solution

01

Acidic buffer

The combination of a weak acid and a salt solution with its conjugate base forms an acidic buffer.

02

The pH of the given solution

Write the 0.12 MH3BO3dissociation equation first.

H3BO3+H2O鈬�H2BO3-+H3O+.

Then, write the 0.82 MNaH2BO3dissociation equation.

NaH2BO3鈫�H2BO3-+ Na+.

We now have the initial boric acid and borate concentrations.

H3BO3= 0.12 M.H2BO3-= 0.82 M.

To find the pH, we may utilize the Henderson-Hasselbalch equation.

pH = pKa + logH2BO3-H3BO3= 9.24 + log0.82 M0.12 M= 10.07.

Therefore, the pH value of the given solution is 10.07.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

As an FDA physiologist, you need 0.700 L of formic acid鈥揻ormate buffer with a pH of 3.74.

(a) What is the required buffer-component concentration ratio?

(b) How do you prepare this solution from stock solutions of 1.0MHCOOHand data-custom-editor="chemistry" 1.0MNaOH?

(c) What is the final concentration of data-custom-editor="chemistry" HCOOHin this solution?

Find the molar solubility of SrCO3(Ksp=-5.4脳10-10)in

(a) pure water and

(b) localid="1663327059323" 0.13MSr(NO3)2.

Write the ion-product expressions for

(a)calciumchromate;(b)silvercyanide;(c)nickel(II)sulfide

Scenes A to C represent aqueous solutions of the slightly soluble salt MZ (only the ions of this salt are shown):

MZ(s)鈬�M2+(aq)+Z2-(aq)

(a) Which scene represents the solution just after solid MZ is stirred thoroughly in distilled water?

(b) If each sphere represents2.5脳10-6M of ions, what is theKsp of MZ?

(c) Which scene represents the solution afterNa2Z(aq)is added?

(d) If Z2-isCO32-, which scene represents the solution after thehas been lowered?

Human blood contains one buffer system based on phosphate species and one on carbonate species. Assuming that blood has a normal of , what are the principal phosphate and carbonate species present? What is the ratio of the two phosphate species? (In the presence of the dissolved ions and other species inblood,Ka1ofH3PO4=1.3脳10-2,Ka2=2.3脳10-7,and Ka3=6脳10-12,Kalof H2CO3=8脳10-7andKa2=1.6脳10-10.)

See all solutions

Recommended explanations on Chemistry Textbooks

Inorganic Chemistry

Read Explanation

Physical Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Kinetics

Read Explanation

Making Measurements

Read Explanation

Organic Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.