1. the term for a solution with a low ph number, such as lemon juice or vinegar, is . 2. the for a solution that has an equal concentration of h and oh- is . 3. the term for a solution with a high ph number, such as ammonia or bleach, is . 4. an acid is a compound that donates to a solution. 5. the higher the ph number, the higher the concentration of in a solution. 6. a substance that accepts h when they are in excess and donates h when their concentration drops is called a(n) .

Explanation:

The answers to the questions are;

1. A solution with low pH is an acid with pH lower than 7

2. A neutral solution has an equal concentration of hydrogen ion and hydroxide ion. It has a pH of 7

3. A base has a high pH number, above 7

4. An acid donates hydrogen ion H+ to a solution

5. Buffer solution

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

helicase, i think thats it