Acids & BasesAcids & Bases

Our Goal for todayOur Goal for today

• To determine the difference between Acids & Bases

• To determine the difference between Acids & Bases

• The pH scale measures

how acidic or basic a solution is.

• The pH scale measures

how acidic or basic a solution is.

•Acids have a ph from 0-7• Lower pH value indicates a

stronger acid.

•Bases have a pH from 7-14• Higher pH value indicates a

stronger base.

•Acids have a ph from 0-7• Lower pH value indicates a

stronger acid.

•Bases have a pH from 7-14• Higher pH value indicates a

stronger base.

• Each pH value is 10 times greater than the value before it.

• For example, a base of 12 is ten times more basic than a base of 11.

• An acid of 2 is 10 times more acidic than an acid of 3.

• Each pH value is 10 times greater than the value before it.

• For example, a base of 12 is ten times more basic than a base of 11.

• An acid of 2 is 10 times more acidic than an acid of 3.

Did we Miss something??Did we Miss something??

• What happens when the pH of a substance is 7?

• Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!

• What happens when the pH of a substance is 7?

• Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!

Test Your KnowledgeTest Your Knowledge

• What is the range of an ACID on the pH scale?

Ans: 0-7

• What is the range of a BASE and what is another name for a BASE?

Ans: 7-14, Alkaline

• What is the range of an ACID on the pH scale?

Ans: 0-7

• What is the range of a BASE and what is another name for a BASE?

Ans: 7-14, Alkaline

Characteristics Of Acids Characteristics Of Acids

Acids can be characterized by:

1. It turns blue litmus paper red2. It tastes sour. Try drinking lemon juice (citric

acid)3. It is corrosive to certain metals4. It conducts electricity

Acids can be characterized by:

1. It turns blue litmus paper red2. It tastes sour. Try drinking lemon juice (citric

acid)3. It is corrosive to certain metals4. It conducts electricity

Characteristics of Bases

Characteristics of Bases

A Base is characterized by:

1. A bitter taste. (Milk of Magnesia)

2. It feels slippery. (Soapy Water)

3. It turns Red Litmus Blue.

A Base is characterized by:

1. A bitter taste. (Milk of Magnesia)

2. It feels slippery. (Soapy Water)

3. It turns Red Litmus Blue.

Examples of AcidsExamples of Acids

• Lemon Juice• Vinegar• Orange Juice• Coffee• Human stomach acid

• Lemon Juice• Vinegar• Orange Juice• Coffee• Human stomach acid

Examples of BasesExamples of Bases

• Blood• Baking soda• Hand soap• Bleach• Ammonia

• Blood• Baking soda• Hand soap• Bleach• Ammonia

• We can neutralize an acid by adding a base to it.

• Vinegar is an acid. To neutralize it, we can add baking soda which is a base.

• We can neutralize an acid by adding a base to it.

• Vinegar is an acid. To neutralize it, we can add baking soda which is a base.