Chapter 26- Acids And Basses

Question 1

Name three everyday acids

Answer 1

Lemon juice
Rain water
Vinegar

Question 2

Acid turns blue litmus

Red litmus

Answer 2

Red

Question 3

Base turns litmus ______

Answer 3

Blue

B.lue for B.ase

Question 4

Acids have a ____ pH

Answer 4

Low

Question 5

Bases have a ____ pH

Answer 5

High

Question 6

Name three lab bases

Answer 6

• sodium hydroxide (NaOH)
• calcium carbonate (CaCO3)
• Limewater (Ca(OH)2)

Question 7

Name three everyday bases

Answer 7

Toothpaste
Bleach
Indigestion tablets

Question 8

Alkali

Answer 8

A base that is soluble in water

Question 9

Neutral

Answer 9

A group of substance with a pH of 7

Neither acidic or basic

Question 10

To create your own indicator

Answer 10

Boil red cabbage leaves

Question 11

Universal indicator levels

Answer 11

Red (1pH)

|orange
|yeallow
|green
|/

Purple/Blue (14pH)

Question 12

Neutralisation

Answer 12

Acid+base-> salt + water

Question 13

Give an example of neutralisation

Answer 13

Dilute Hydrochloric acid + Sodium Hydroxide = salt+carbon dioxide +water

HCL+ NaOH = NaCh + Co2 + H2O

Question 14

Titration

Answer 14

Allows you to find out exactly how much acid is needed to neutralise a base

Question 15

Pipette measures

Answer 15

Base

Eg NaOH

Question 16

Burette measures

Answer 16

Acid

Eg. HCL

Question 17

Explain steps for titration

Answer 17

Pipettes 25cm^3 of NaOH
Add indicator
Burette drop HCL in until indicator changes

Do result again w/o indicator
Will be left with NaCl and H2O

Question 18

Equation for metal reacting with acid

Answer 18

Zinc+Hydrochloric acid-> Zinc Chloride +hydrogen

Question 19

When metals and acids react ___ and ___ are produced

Answer 19

Salt

Hydrogen

Question 20

Test for hydrogen

Answer 20

Lighting a splint and seeing if it will burn with a pop sound

Question 21

Name two lab acids

Answer 21

HCL acid

Sulfuric acid