True or false: acids and bases

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   The pH scale generally runs from 0 to 14.

2. Statement is true

   No

   Statement

   A higher hydronium ion concentration means a higher pH value.

3. Statement is true

   Yes

   Statement

   Rain water with pH below 5.6 is called acid rain.

4. Statement is true

   No

   Statement

   Tooth decay starts when the pH of the mouth rises above 7.

5. Statement is true

   Yes

   Statement

   Turmeric is a natural indicator.

Instructions

Decide whether each statement about acids and bases is true or false.

Explanation