8th Acids vs Bases Intro.

Acids and Bases

​

Multiple Choice

The smallest part of an element is

• proton

• atom

• compound

• mixture

Multiple Choice

Which of the following are properties of acids?

• They conduct electricity when dissolved in water

• They taste sour

• They react with metals to produce hydrogen gas

• All of the answer choices are correct

Multiple Choice

Bases have many uses. They are mainly used to make

• cleaning products

• soaps

• concrete

• all of the answer choices

​All Right! Let's see what you have learned! Use your notes!

Multiple Choice

If the substance is neutral, what would the pH be?

• 3

• 5

• 7

• 9

• 11

Multiple Choice

Which of the following pH values represents a base?

• 2.1

• 4.6

• 6.8

• 8.1

Multiple Choice

Which is the stronger acid?

• pH 1

• pH 4

• pH 8

• pH 13

Multiple Choice

Which of the following is a base?

• baking soda in water

• orange juice

• vinegar

• lemonade

Multiple Choice

The strongest bases have pH values close to

• 0

• 14

• 7

• 5

Multiple Choice

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.

• a stronger acid.

• impossible to tell without testing the pH.

• a stronger base

Multiple Choice

Which of these pH values represent an acid?

• 4

• 8

• 10

• 12

Multiple Choice

Milk is a very weak acid. What might its pH value be?

• 6.5

• 7.8

• 4.2

• 12.2

Explanation Slide...

Remember H+ is another name for an acid. So, another way to ask this would be; which of these is the strongest acid?

Multiple Choice

The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of H⁺ ions?

• vinegar

• milk

• water

• bleach

Explanation Slide...

Anything below 7 is considered an acid; below 6 is definitely an acid.

Multiple Choice

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

• Acid Rain

• Basic Rain

• High pH Rain

• Purple Rain

Match

Match the following

• higher than 7

• lower than 7

• 7

base

acid

neutral

• base

• acid

• neutral

Match

Match

• H+

• OH-

• NaCl

Acid

Base

Salt

• Acid

• Base

• Salt

Match

Match these

• strongly acidic

• slightly acidic

• strongly basic (alkaline)

• slightly basic (alkaline)

3.3 mountain dew

6.7 milk

13 ammonia

7.35 human blood

• 3.3 mountain dew

• 6.7 milk

• 13 ammonia

• 7.35 human blood

Match

Match

• H+

• OH-

• NaCl

Acid

Base

Salt

• Acid

• Base

• Salt

Explanation Slide...

The pH scale ranges from 0-14.

Multiple Choice

pH 25

• acid

• base

• neutral

• doesn't exist

Explanation Slide...

Remember OH- is another name for a base. So, another way to ask this would be: which of these is the strongest base?

Multiple Choice

The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of OH^- ions?

• vinegar

• milk

• water

• bleach

Drag and Drop

Acids, also known as ​

Placeholder

, will turn litmus paper ​

Placeholder

. This is because they have a pH ​

Placeholder

. They taste ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

H+

red

below 7

sour

bitter

above 7

blue

Drag and Drop

Bases, also known as ​

Placeholder

will turn litmus paper ​

Placeholder

. This is because they have a pH ​

Placeholder

. They taste ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

alkali and OH-

blue

above 7

bitter

below 7

H+

red

sour

Drag and Drop

Acids, also known as ​

Placeholder

, will turn litmus paper ​

Placeholder

. This is because they have a pH ​

Placeholder

. They taste ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

H+

red

below 7

sour

bitter

above 7

blue