1.
distilled water has a hydronium ion concentration of 1 × 10–7 m. what is the ph of distilled water?

7
–7
10
1 × 10–7

2.
a compound has a ph of 6 in solution, where very little of it has ionized. the compound is a

weak base.
strong base.
weak acid.
strong acid.

3.

what are solutions that are resistant to large changes in ph?

electrolytes
strong acids
buffers
strong bases

4.
which of the following are examples of strong electrolytes?

strong and weak bases
strong acids and strong

1. Distilled water has a hydronium ion concentration of 1 × 10–7 M. What is the pH of distilled water? 
pH = -log [1 × 10–7 M]
pH = 7

2. 
A compound has a pH of 6 in solution, where very little of it has ionized. The compound is a 

weak acid. Since, it has a slightly acidic pH which is less than 7.

3. What are solutions that are resistant to large changes in pH?

They are buffers. These are systems of substances that is not affected that much by the change in the pH.

4. Which of the following are examples of strong electrolytes? 

strong acids and strong bases. They fully dissociate in aqueous solution.

B. absorbs violet lightto get absorb sunlight for photosyntesis