Asked by Meghan Green on Jul 31, 2024
Verified
Many plant pigments can be used as colorimetric tests for changes in ________.
A) temperature
B) carbohydrate concentration
C) pH
D) water purity
E) sodium ion (Na+) concentration
Colorimetric Tests
Analytical techniques that determine the concentration of substances by measuring the intensity of color produced from chemical reactions.
Plant Pigments
Natural compounds produced by plants that absorb specific wavelengths of light and give plants their color.
Sodium Ion
A positively charged ion formed when sodium loses one electron, playing crucial roles in nerve impulse transmission and fluid balance in the body.
- Acquire knowledge about the pH concept and its measurement scale, focusing on the critical role that hydrogen (H+) and hydroxide (OH-) ions play in establishing whether a solution is acidic or basic.
- Recognize the importance of color transitions in determining the presence and quantity of particular compounds during chemical analyses.
Verified Answer
ZK
Zybrea KnightAug 02, 2024
Final Answer :
C
Explanation :
Plant pigments such as anthocyanins, chlorophyll, and betalains are known to change color in response to changes in pH. For example, anthocyanins turn purple in acidic solutions and red in basic solutions. Therefore, they can be used as colorimetric tests for pH changes. The other options listed do not have a direct correlation with plant pigments and their color changes.
Learning Objectives
- Acquire knowledge about the pH concept and its measurement scale, focusing on the critical role that hydrogen (H+) and hydroxide (OH-) ions play in establishing whether a solution is acidic or basic.
- Recognize the importance of color transitions in determining the presence and quantity of particular compounds during chemical analyses.