The pH of a solution is 5.0. To this solution sufficient acid is I added to decrease the pH to 2.0. The increase in hydrogen ion concentration is

b. 1000 times

d. 10 times

a. 100 times

c. 2.5 times

a. 6

C. O

The pOH of a solution is 6.0, its pH will be

b. 8

d. 14The pH of a solution is 5.0. To this solution sufficient acid is I added to decrease the pH to 2.0. The increase in hydrogen ion concentration is

Let's address each part of the question one by one.

### Part 1: Increase in Hydrogen Ion Concentration
- **Initial pH**: 5.0
- **Final pH**: 2.0

The pH of a solution is defined as:

\[
\text{pH} = -\log[\text{H}^+]
\]

where \([\text{H}^+]\) is the concentration of hydrogen ions in the solution.

Given the pH values:
- **Initial \([\text{H}^+]\)** when pH = 5.0:
  \[
  [\text{H}^+]_1 = 10^{-5} \text{ M}
  \]

- **Final \([\text{H}^+]\)** when pH = 2.0:
  \[
  [\text{H}^+]_2 = 10^{-2} \text{ M}
  \]

The increase in hydrogen ion concentration is calculated by the ratio:

\[
\text{Increase} = \frac{[\text{H}^+]_2}{[\text{H}^+]_1} = \frac{10^{-2}}{10^{-5}} = 10^{3} = 1000
\]

Thus, the hydrogen ion concentration increases by **1000 times**. The correct answer is **(b) 1000 times**.

### Part 2: Finding pH from pOH
- **Given pOH**: 6.0

The relationship between pH and pOH is:

\[
\text{pH} + \text{pOH} = 14
\]

So,

\[
\text{pH} = 14 - \text{pOH} = 14 - 6 = 8
\]

The correct pH value is **(b) 8**.

---

Do you want more details or have any questions? 

Here are five related questions:
1. What is the relationship between pH and the strength of an acid?
2. How does the pH scale relate to acidity and basicity?
3. How does temperature affect pH and pOH?
4. What happens to the pH of a solution if a strong base is added?
5. How do buffers resist changes in pH?

**Tip:** Remember that a change of 1 in pH corresponds to a tenfold change in hydrogen ion concentration.

Explore how to calculate changes in hydrogen ion concentration and pH values in acid-base solutions. Solve specific problems like determining the increase in hydrogen ion concentration when pH changes from 5.0 to 2.0 and find the pH value from given pOH. Learn about pH definitions and acid-base reaction principles. Suitable for high school chemistry students.

Math Problem Statement

Solution

Ask a new question for Free

By Image

Math Problem Analysis

Mathematical Concepts

Formulas

Theorems

Suitable Grade Level

Related Recommendation