Universal indicator solution is composed of a blend of molecules that elicit a color alteration upon encountering H+ and OH– ions. This solution is employed by scientists to estimate the pH of an unfamiliar substance. Analyze the chart provided to observe the array of pH levels identified by universal indicator solution and the colors they associate with.

Question

Red: ph: 1
Pink: ph: 2
Orange: ph: 3
Beige: ph: 4
Yellow: ph: 5
Lime-green: ph: 6
Green: ph: 7
Dark green: ph: 8
Turquoise: ph: 9
Pale blue: ph: 10
Blue: ph: 11
Dark blue: ph: 12
Violet: ph: 13
Purple: ph: 14

Answer 1

The universal indicator solution provides a visual representation of pH levels ranging from acidic to alkaline through color changes. Each color corresponds to a specific pH value, allowing scientists to approximate the acidity or alkalinity of a substance. Here's a summary of the color changes and their associated pH levels:

• Red: pH 1 (Strongly acidic)
• Pink: pH 2 (Very strongly acidic)
• Orange: pH 3 (Strongly acidic)
• Beige: pH 4 (Moderately acidic)
• Yellow: pH 5 (Slightly acidic)
• Lime-green: pH 6 (Neutral to slightly acidic)
• Green: pH 7 (Neutral)
• Dark green: pH 8 (Slightly alkaline)
• Turquoise: pH 9 (Moderately alkaline)
• Pale blue: pH 10 (Strongly alkaline)
• Blue: pH 11 (Very strongly alkaline)
• Dark blue: pH 12 (Strongly alkaline)
• Violet: pH 13 (Very strongly alkaline)
• Purple: pH 14 (Strongly alkaline)

This color-code key allows for quick visual identification of pH levels, which is vital in various scientific applications, such as chemistry, biology, and environmental science. By comparing the color of the solution with a standard chart, scientists can rapidly assess the acidity or alkalinity of a sample.