exp 6

Question 1

acids were first associated with the _____

Answer 1

sour taste of vinegar

Question 2

The word acid comes from what language

Answer 2

Latin

Question 3

The word acid comes from the Latin word “______”

Answer 3

acidus

Question 4

The word acid comes from the Latin word “acidus” which means?

Answer 4

sour

Question 5

Bases have a ______ taste and _______ feel

Answer 5

Bitter, slippery

Question 6

The bitter taste of tonic water comes from ______, a natural base

Answer 6

quinine

Question 7

_______ is used to soothe heartburn

Answer 7

Antacids

Question 8

________ is frequently used as antacid and laxative are among the example of bases

Answer 8

Milk of Magnesia

Question 9

________ is the most important base that is used as a raw material in the manufacturer of glass and soap

Answer 9

Sodium hydroxide

Question 10

______ are organic compounds that change color at specific pH and it is used to determine the nature of a solution

Answer 10

Indicators

Question 11

Acid : bases
Sour taste:_______

Answer 11

bitter taste

Question 12

Acid : bases
_______ : change color of litmus paper to blue

Answer 12

change color of litmus paper to red

Question 13

Acid : bases
Do not change color with phenolphthalein: _________

Answer 13

change color of phenolphthalein to pale pink

Question 14

Acid : bases
_______ : have a soapy, slippery feeling

Answer 14

react with active metals to produce hydrogen gas

Question 15

Acid : bases
_______ : none

Answer 15

react with carbonates to produce carbon dioxide

Question 16

Acid : bases
Reacts with bases : ______

Answer 16

react with acids

Question 17

_______ are classified as strong or weak depending on the degree of ionization in water

Answer 17

acids

Question 18

_____ are completely ionized in aqueous solutions while weak acids ionize only slightly

Answer 18

strong acids

Question 19

Strong acids are completely ionized in aqueous solutions while ______ ionize only slightly

Answer 19

weak acids

Question 20

_____ dissociate 100% into metal ions and hydroxide ions in aqueous solutions

Answer 20

Strong bases

Question 21

_______ partially ionize in aqueous solution

Answer 21

Weak bases

Question 22

when acids and bases react with one another in equal ratios, it will result to ___

Answer 22

neutralization

Question 23

Products of neutralization

Answer 23

salt and water

Question 24

What does neutral substances do to litmus paper or the indicator phenolphthalein?

Answer 24

Does not change its color

Question 25

______ do not have a sour or bitter taste and they are neither acidic or basic

Answer 25

Neutral substances

Question 26

6 Materials needed for exp 6?

Answer 26

• dropper, 2pc
• graduated cylinder, 1, 10 ml
• litmus paper, blue and red
• stirring rod
• test tube, 9 pc
• test tube rack

Question 27

(10) Reagents used in exp 6?

Answer 27

• distilled water
• acetic acid, aq
• hydrochloric acid, aq
• nitric acid, aq
• sodium chloride, aq
• unknown sample
• aqueous ammonia, aq
• lactic acid, aq
• potassium hydroxide, aq
• sodium hydroxide, aq

Question 28

In exp 6, aqueous solutions must have a ____ concentration

Answer 28

0.1 M