ENGINEERING AND INDUSTRIAL TECHNOLOGY

Plumber

Science
Skill Check

As a plumber, you must know the pH of each customer’s water in order to recommend ways to keep the water pure and safe for drinking. You know that the pH of water is measured on a scale of 1 to 14. An acid has a pH less than 7. A neutral substance, like water, has a pH of 7. An alkali has a pH greater than 7. Study the pH levels of the substances shown below and label each as acidic, neutral, or alkaline.

1. sodium hydroxide pH 14
2. vinegar pH 3.5
3. lemon juice pH 2
4. calcium hydroxide pH 12
5. pure water pH 7

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