### Change in pH of a Solution **15. If a solution's pH was changed from 5 to 8:** - **a. What was the [H+] in the beginning?** ____ - **b. What was the [H+] in the end?** ____ - **c. Solution with pH 5 is an acid or base?** ____ - **d. Solution with pH 8 is an acid or base?** ____ - **e. When pH changed from 5 to 8 did [H+] increase or decrease?** ____ - **By how much?** ____ ### Identifying Structural Isomers of C6H14: **16. Which of the following illustrations is not a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted. Explain why you picked that molecule. (2 points)** - **A)** C—C—C—C—C—C - **B)** C \ C—C—C—C—C - **C)** (The illustration in this image is marked with a circle) ``` C—C—C—C \ C—C ``` - **D)** ``` C—C—C—C—C \ C ``` The illustration marked with a circle in the image appears to be answer **C**. --- For a detailed description: 1. **Option A** shows a straight-chain alkane with 6 carbon atoms (hexane). 2. **Option B** shows a chain with a methyl group branching from the second carbon (2-methylpentane). 3. **Option C**, marked with a circle in the image, shows a structure with 5 continuous carbon atoms and a single carbon branching from the third carbon (3-methylpentane). 4. **Option D** shows another branched structure with 4 continuous carbons and two single carbons branching off the second and the fourth carbon (2-methylbutane). **Explanation for choice C based on the image:** Option **C
### Change in pH of a Solution **15. If a solution's pH was changed from 5 to 8:** - **a. What was the [H+] in the beginning?** ____ - **b. What was the [H+] in the end?** ____ - **c. Solution with pH 5 is an acid or base?** ____ - **d. Solution with pH 8 is an acid or base?** ____ - **e. When pH changed from 5 to 8 did [H+] increase or decrease?** ____ - **By how much?** ____ ### Identifying Structural Isomers of C6H14: **16. Which of the following illustrations is not a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted. Explain why you picked that molecule. (2 points)** - **A)** C—C—C—C—C—C - **B)** C \ C—C—C—C—C - **C)** (The illustration in this image is marked with a circle) ``` C—C—C—C \ C—C ``` - **D)** ``` C—C—C—C—C \ C ``` The illustration marked with a circle in the image appears to be answer **C**. --- For a detailed description: 1. **Option A** shows a straight-chain alkane with 6 carbon atoms (hexane). 2. **Option B** shows a chain with a methyl group branching from the second carbon (2-methylpentane). 3. **Option C**, marked with a circle in the image, shows a structure with 5 continuous carbon atoms and a single carbon branching from the third carbon (3-methylpentane). 4. **Option D** shows another branched structure with 4 continuous carbons and two single carbons branching off the second and the fourth carbon (2-methylbutane). **Explanation for choice C based on the image:** Option **C
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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