Reactions of Acids and Bases + their properties

Question 1

What is pH?

Answer 1

it is the measurement of how basic or acidic a substance is. pH measures the concentration of hydrogen ions

Question 2

An acidic solution with have a pH of?

Answer 2

below 7

Question 3

A neutral solution will have a pH of?

Answer 3

7

Question 4

A basic solution will have a pH of?

Answer 4

above 7

Question 5

1. If red litmus paper is put in a basic solution it’ll?

2. If blue litmus paper is put into an acidic solution it’ll?

Answer 5

1. turn blue

2. turn red

Question 6

1. If red litmus paper is put in an acidic solution it’ll?

2. If blue litmus paper is put in a basic solution it’ll?

Answer 6

1. stay red

2. stay blue

Question 7

1. what colour will blue litmus change to in a neutral solution?
2. what colour will red litmus change to in a neutral solution?

Answer 7

1. It’ll stay blue

2. It’ll stay red

Question 8

What colour will the universal indicator change to if:

1. Put into an acidic solution.
2. Put into a basic solution
3. Put into a neutral solution

Answer 8

1. red, orange or yellow
2. blue, violet or purple
3. green

Question 9

What colour will bromothymol blue to if:

1. Put into an acidic solution.
2. Put into a basic solution
3. Put into a neutral solution

Answer 9

1. yellow
2. blue
3. green

Question 10

What colour will Phenolphthalein change to if:

1. Put into an acidic solution.
2. Put into a basic solution
3. Put into a neutral solution

Answer 10

1. Colourless
2. pink, red
3. colourless

Question 11

An acid is any substance that releases what in solution?

Answer 11

Hydrogen Ions

Question 12

acids are know as what kind of donors?

Answer 12

Proton donors

Question 13

A base is any substance that accepts what in solution?

Answer 13

Hydrogen ions

Question 14

A base is also known as a what kind of acceptor?

Answer 14

A proton acceptor

Question 15

What is a base that dissolves in water known as?

Answer 15

An alkali

Question 16

Alkalis release what in solution?

Answer 16

Hydroxide ions

Question 17

the H ion and OH ion combine to from what?

Answer 17

Water- H2O

Question 18

An Acid neutralises a base to give us what?

Answer 18

salt and water

Question 19

acids taste?

Answer 19

sour

Question 20

acids feel?

Answer 20

rough

Question 21

Bases taste?

Answer 21

bitter

Question 22

bases feel?

Answer 22

smooth silky

Question 23

give 3 examples of households acids

Answer 23

lemon juice, vinegar and Tomato sauce.

Question 24

give 3 examples of household bases

Answer 24

handy Andy, washing powder and soap

Question 25

give 2 examples of lab acids and their respective formulas

Answer 25

Hydrochloric acid- HCl | sulphuric acid-H2SO4

Question 26

give 2 examples of lab bases and their respective formulas

Answer 26

sodium hydroxide-NaOH | magnesium hydroxide-Mg(OH)2

Question 27

how would now test for hydrogen?

Answer 27

hold a burning match at the mouth of the test-tube, if hydrogen is present, a pop sound will be heard.

Question 28

How would one test for carbon dioxide?

Answer 28

if a gas is bubbled through clear lime water [Ca(OH)2] and the lime water turns milky then CO2 is present.

Question 29

what are the 4 general reactions when working with acids and bases.

Answer 29

1. Acid + metal hydroxide -> salt + water (neutralisation) 2. Acid + metal oxide -> salt + water (neutralisation) 3. Acid + Carbonate -> salt + water + carbon dioxide (neutralisation) 4. Acid + Metal -> Salt + Hydrogen

Question 30

salt is what kind of compound?

Answer 30

An ionic compound

Question 31

What is the formula for 1. Hydrochloric acid 2. sulphuric acid 3. nitric acid

Answer 31

1. HCl 2. H2SO4 3. HNO3

Question 32

give all 4 names for NaHCO3

Answer 32

1. Sodium hydrogen carbonate 2. Sodium bicarbonate 3. Bicarbonate of Soda 4. Baking soda

Question 33

Where would you find acetic acid?

Answer 33

In vinegar

Question 34

1. what is another name for tartaric acid? | 2. what is it used for?

Answer 34

1. cream of tartar | 2. Baking

Question 35

what is the scientific name for fizzes

Answer 35

effervesce

Question 36

The gas for making leavened bread is made in two ways: 1. what is this gas? 2. give the two ways and their formulas.

Answer 36

1. carbon dioxide 2. a) reacting sodium bicarbonate with an acid carbonate+acid-> salt+water+CO2 b) Heating the sodium

Question 37

what is the difference between a carbonate and a bicarbonate?

Answer 37

There is hydrogen in bicarbonate but there isn't hydrogen in in carbonate.

Question 38

What is the difference between baking soda and baking powder.

Answer 38

baking powder already has an acid in the mixture but baking soda needs an acidic ingredient to react with it.

Question 39

What kind of reaction takes place between the stomach acid and the antacid.

Answer 39

neutralisation

Question 40

why did you burp shortly after taking an antacid?

Answer 40

Because carbon dioxide is released.