pH Scale and Solution Classification

The video tutorial explains the pH scale, highlighting that a pH of 7 is neutral. It describes how solutions become more acidic as the pH decreases and more basic as it increases. The video also covers methods to test pH levels, such as using pH paper or an electronic balance, and clarifies that only a pH of exactly 7 is neutral, while values slightly below or above are considered acidic or basic, respectively.

What is the pH value of a neutral solution?

• 5

• 9

• 14

• 7

On the pH scale, what type of solution is found at values lower than 7?

• Alkaline

• Acidic

• Basic

• Neutral

What color should pH paper turn if dipped in a neutral solution?

• Blue

• Red

• Pink

• Olive green yellow

Which tool provides a more precise pH reading than pH paper?

• Ruler

• Barometer

• Electronic balance

• Thermometer

If a solution has a pH of 6.999999, how is it classified?

• Alkaline

• Acidic

• Basic

• Neutral

What is the classification of a solution with a pH of 7.0001?

• Neutral

• None of the above

• Acidic

• Basic