pH
What is pH a measure of?
pH = Power of Hydrogen
or the amount of hydrogen
What will the pH be if a substance is acidic?
If a substance has a pH less than 7, it is acidic.
What will the pH be if a substance is basic?
If a substance has a pH greater than 7, it is basic.
What does it mean when the pH of a substance is 7?
It means that the substance is neutral, or is neither acidic nor basic.
what is pH good for?
pH is good for measuring the Acidity or Alkaline in a substance.
What color does litmus paper turn into when the substance being tested is an acid?
Red
What color does litmus paper turn into when the substance being tested is a Base?
Blue
if the tester strip is a blue color what would it be?
basic
pH measures what in water?
Hydrogen
What are the most common properties of acids?
Taste - Sour
Smell - frequently burns nose
Texture - Sticky
Reactivity - Frequently react with metals to form H2
What are the most common properties of bases?
Taste - Bitter
Smell - Usually no smell (except NH3!)
Texture - Slippery
Reactivity - React with many oils and fats
what substance is basic or neutral?
distilled water
What is the equation for pH?
pH = -log[H+]
would a 6.5 count as an acid or would it be close enough to be basic?
it would be an acid even though it is close to 7 (basic) it is not.
what is a pH of 8?
A base
how does a basic substance affect the body?
it would only benefit the body, like distilled water.
what are the colors a pH tester would turn in a base or acid?
A base would be a indigo violet or purple color, an acid would be a green yellow orange or red color
What is the pH of HCl when added to water?
pH = -log [1 in 100]
pH = -log [1x10-2]
pH = 2
What is the pH of NaOH when added to water?
First the hydroxide ion and the hydrogen ion will quickly combine to form water.
pH = -log [1x10-12]
pH = 12
what is a Basic of the pH scale?
For a pH scale a base is the middle between acidic and non acidic. A basic property is a neutral substance, not acidic nor a base.