Answered: Write the balanced reaction of…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1. Write the balanced reaction of hydroxide ion with hydrofluoric acid, HF, to for fluoride ion and water. Identify each species as either an acid or a base.

2. For the following reactions label each species as either an acid or a base. Indicate the species that are conjugates of one another.

a) HSO4- + NH3 ⇌ SO42- + NH4+

b) HPO42- + NH4+ ⇌ H2PO4- + NH3

c) Al(H2O)63+ + H2O ⇌ Al(H2O)5OH2+ + H3O+

d) SO32- + NH4+ ⇌ HSO3- + NH3

3. What are the concentrations of H3O+ and OH- in each of the following:

a) 1.2 mol dm-3 HBr

b) 0.32 mol dm-3 KOH

c) 0.085 mol dm-3 Ca(OH)2

d) 0.38 mol dm-3 HNO3

4. The following are solution concentrations. Indicate whether each is acidic, neutral or basic:

a) 5 x 10-6 mol dm-3 H3O+

b) 5 x 10-9 mol dm-3 OH-

c) 1 x 10-7 mol dm-3 OH-

d) 2 x 10-9 mol dm-3 H3O+

5. A solution of washing soda (sodium carbonate, Na2CO3) has a hydroxide ion concentration of 0.0040 mol dm-3. What is the pH at 25°C?

6. A detergent solution has a pH of 11.63 at 25°C. What is the hydroxide ion concentration?

7. A 1dm3 aqueous solution contains 5.80g of sodium hydroxide, NaOH. What is the pH of the solution at 25°C?

8. A 1dm3 aqueous solution contains 6.78g of barium hydroxide, Ba(OH)2. What is the pH of the solution at 25°C?

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