### Weak Acids and Weak Bases Data#### Acids:| Name | Formula | \( K_a \) ||--------------------|---------|-------------------|| Hydrocyanic acid | HCN | \( 4.9 \times 10^{-10} \) || Nitrous acid | HNO\(_2\) | \( 4.5 \times 10^{-4} \) |#### Bases:| Name | Formula | \( K_b \) ||---------|------------|-------------------|| Ammonia | NH\(_3\) | \( 1.8 \times 10^{-5} \) || Aniline | C\(_6\)H\(_5\)NH\(_2\) | \( 4.3 \times 10^{-10} \) |### Task:Use the data provided to rank the following solutions in order of increasing pH. Select a '1' next to the solution with the lowest pH, a '2' for the next, and so forth.#### Solutions to Rank:| Solution | pH Ranking ||-------------------|----------------------|| 0.1 M NaCN | [Select Rank] || 0.1 M NaNO\(_3\) | [Select Rank] || 0.1 M NH\(_4\)Cl | [Select Rank] || 0.1 M KNO\(_2\) | [Select Rank] |### Instructions:For each solution, consider the acidic or basic nature of the ions present, and how they dissociate in water to affect the pH level.

Answered: Consider the following data on some…

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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### Weak Acids and Weak Bases Data

#### Acids:
| Name | Formula | \( K_a \) |
|--------------------|---------|-------------------|
| Hydrocyanic acid | HCN | \( 4.9 \times 10^{-10} \) |
| Nitrous acid | HNO\(_2\) | \( 4.5 \times 10^{-4} \) |

#### Bases:
| Name | Formula | \( K_b \) |
|---------|------------|-------------------|
| Ammonia | NH\(_3\) | \( 1.8 \times 10^{-5} \) |
| Aniline | C\(_6\)H\(_5\)NH\(_2\) | \( 4.3 \times 10^{-10} \) |

### Task:

Use the data provided to rank the following solutions in order of increasing pH. Select a '1' next to the solution with the lowest pH, a '2' for the next, and so forth.

#### Solutions to Rank:
| Solution | pH Ranking |
|-------------------|----------------------|
| 0.1 M NaCN | [Select Rank] |
| 0.1 M NaNO\(_3\) | [Select Rank] |
| 0.1 M NH\(_4\)Cl | [Select Rank] |
| 0.1 M KNO\(_2\) | [Select Rank] |

### Instructions:

For each solution, consider the acidic or basic nature of the ions present, and how they dissociate in water to affect the pH level.

Expert Solution

Step 1: Concepts required to solve the given problem!

Answer:

Three concepts will be required to arrange the given solutions in increasing order of pH:

Salt of strong acid and weak base produces weakly acidic solution and salt of weak acid and strong base produces weakly basic solution due to hydrolysis.
Salt of strong acid and strong base always produces a neutral solution because none of its ions can go under hydrolysis.
conjugate base of strong acid will be the weaker base and conjugate acid of strong base will be the weaker acid and vice versa.

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