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An acid is a substance that produces a hydronium ion (H 3 O + ) when placed in water. Examples of Acids:
Sour Taste Can damage skin and eyes Corrosive – react with metals Conduct electricity
A base is a substance that produces hydroxide ions (OH-) when dissolved in water. Examples:
Bitter Taste Can damage skin and eyes Slippery when mixed with water Conduct electricity
A salt forms when the negative ions from an acid combine with the positive ions from a base. Neutralization – when the acid and base cancel each other out
The pH scale is used to indicate how acidic or basic a solution is. A change in one pH unit represents a tenfold change. For example a pH of 1 is ten times stronger than a pH of 2.
An indicator is a compound that changes color at different pH values when it reacts with acidic or basic solutions. pH testing strips pH meters
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