Lesson 4: pH, Acids, Bases and Buffers

Question 1

pH Indicator

Answer 1

Are compounds that reveal pH level with a change in colour

Question 2

Acid Formula structure

Answer 2

H+ and Negative Ion

Question 3

Most common indicator

Answer 3

Litmus

Question 4

What does the pH scale measure?

Answer 4

The pH scale measures the acidity or alkalinity of a solution.

Question 5

True or False: A pH of 7 is considered neutral.

Answer 5

True

Question 6

Fill in the blank: A solution with a pH less than 7 is considered _____.

Answer 6

acidic

Question 7

What is the pH value of a strong acid?

Answer 7

A strong acid typically has a pH value between 0 and 3.

Question 8

Which of the following is a characteristic of a basic solution? (A) pH < 7 (B) pH = 7 (C) pH > 7

Answer 8

C) pH > 7

Question 9

When do some of the acids start showing acidic properties?

Answer 9

When dissolved in water

Question 10

What ions do acids release?

Answer 10

H+ ions

Question 11

What symbol goes first in formulas of acids that contain Carbon?

Answer 11

C

Question 12

Ending for the acid name which contains anion ending with -ate?

Answer 12

-ic acid

Question 13

Ending for the acid name which contains anion ending with -ite?

Answer 13

-ous acid

Question 14

Ending for the acid name which contains anion ending with -ide?

Answer 14

-ic acid

Question 15

Range of pH scale

Answer 15

0 to 14

Question 16

How many times pH 3 is more acidic than pH 7?

Answer 16

10000

Question 17

What is an acidic level of blood?

Answer 17

7.4 pH

Question 18

What are the buffers and their function?

Answer 18

Body regulatory elements that keep acidity of organism on the same level.