pH scale

The pH scale is used for measuring the acidity or alkalinity of substance. the numerical scale used for pH is 0-14. The number that is defined as neutral on the pH scale is 7.0. The acids on the pH scale are found at the top starting with 0 to all the numbers less than 7. The bases are at the bottom starting with all numbers less than 7 up to 14. An example of acid is vinegar and stomach acid. An example of a base is lye (sodium Hydroxide) and Ammonia.