1. Notes on the following vocab terms:
Acids/Bases
Notes on the following vocab terms:
Acid
Hydronium ion
Base pH
Indicator

2. 1. Acid
A substance that produces a hydronium ion when dissolved in water
Any substance less than 7 on the pH scale
Ex. Milk (lactic acid), citrus (citric acid)
Acids react with bases to form neutral solution
Can damage skin and eyes
Conducts electricity in water

3. 2. Hydronium ion
A positively charged ion formed when an acid dissolves in water
H3O+
Hydronium ions form when a hydrogen atom is added to a water molecule
The higher the concentration, the more acidic a solution is

4. 3. Base Substance that produces hydroxide ions when dissolved in water
Any substance greater than 7 on the pH scale
Bases are the result of a hydrogen atom being removed from a water molecule (HO-)
Lowers overall acidity when combined with acid
Can damage skin and eyes
Slippery when mixed with water
Conducts electricity in water

5. 4. pH
An inverse measure of the concentration of hydronium ions in a solution
The pH of a solution can only be measured if it includes water
pH scale ranges from 0 – 14
< 7 is more acidic
> 7 is more basic
= 7 is neutral

6. 5. Indicator
Compound that changes color at different pH values when it reacts with acidic or basic solutions
Ex. pH testing strips, pH meters
Testing strips work by changing color in the presence of either an acid or a base