Properties
Give 3 examples of physical properties.
Color
Smell
Hardness
Luster
What number is neutral on the pH scale?
7
What is an example of an acid?
Lemon, tomato, etc.
What is an example of a base?
Soap, broccoli, etc.
Name a substance that has a neutral pH.
Water
Give 3 examples of chemical properties.
Acidity
Toxicity
Flammability
What range of numbers are acids on the pH scale?
0-6
Name three properties of acids.
Burn skin, sour, create hydrogen ions when they react with water, etc.
Name three properties of bases.
Slippery, burn skin, hydroxide - ions
What is neutralization?
When you add an acid and a base to reach a pH on or near 7.
Define property
A property is a characteristic or trait of a substance
What range of numbers are bases on the pH scale?
8-14
Define acids.
Acids are ionic compounds that break apart to form hydrogen + ions in water.
Define bases.
Bases are ionic compounds that break apart to form hydroxide - ions in water.
What are the three products of a neutralization reaction?
Salt, water, heat.
Define physical property
A physical property is a property that can be observed without chemically altering the substance
What is the pH human blood? Is it basic or acidic?
8, basic
How are acids used in cooking?
Answers will vary.
What is another word used for bases?
Alkaline
What happens to bases when they are neutralized?
What is a chemical property
A chemical property is a property that must be tested which alters the substance.
What is the pH of a tomato? Is it basic or acidic?
4, acidic
Name 4 examples of acids.
Stomach acid, milk, lemons, vinegar, bananas.
Name 4 examples of bases.
Sodium hydroxide, soap, bleach, human blood, broccoli
What is an example of a neutralization reaction? (write it out)
HCl + NaOH -> H20 + NaCl