Acids and Alkali

Question 1

What is used to identify whether a substance is acidic, neutral or alkaline?

Answer 1

Universial indicator.

Question 2

What is the formula of HYDROCHLORIC ACID?

Answer 2

HCl

Question 3

What is the formula of NITRIC ACID?

Answer 3

HNO3

Question 4

What is the formula of SULFURIC ACID?

Answer 4

H2SO4

Question 5

What is the formula of PHOSPHORIC ACID?

Answer 5

H3PO4

Question 6

What is the formula of SODIUM HYDROXIDE?

Answer 6

NaOH

Question 7

What is the formula of POTASSIUM HYDROXIDE?

Answer 7

KOH

Question 8

What is the formula of CALCIUM HYDROXIDE?

Answer 8

Ca(OH)2

Question 9

What is the formula of ALUMINIUM HYDROXIDE?

Answer 9

Al(OH)3

Question 10

What is: Universial indicator used for?

Answer 10

To identify whether a substance is acidic, neutral or alkaline.

Question 11

What is: HCl

Answer 11

Hydrocholoric acid

Question 12

What is: HNO3

Answer 12

Nitric acid

Question 13

What is: H2SO4

Answer 13

Sulfuric acid

Question 14

What is: H3PO4

Answer 14

Phosphoric acid

Question 15

What is: NaOH

Answer 15

Sodium hydroxide

Question 16

What is: KOH

Answer 16

Potassium hydroxide

Question 17

What is: Ca(OH)2

Answer 17

Calcium hydroxide

Question 18

What is: Al(OH)3

Answer 18

Aluminium hydroxide

Question 19

What is: ELECTROLYSIS?

Answer 19

A process in which a compound is broken down into its elements using electricity.

Question 20

Why is a direct current used in electrolysis?

Answer 20

So that one of the electrodes is always positive and the other is alwas negative.

Question 21

During the electrolysis of an acid, what is always formed at the negative electrode?

Answer 21

Hydrogen

Question 22

What is: the process in which a compound is broken down into its elements using electricity?

Answer 22

Electrolysis.

Question 23

During the electrolysis of an acid, hydrogen is always formed at what electrode?

Answer 23

The negative electrode.

Question 24

Diluton of an acid cause the pH to…?

Answer 24

Rise towards 7.

Question 25

Diluton of an alkali cause the pH to...?

Answer 25

Decrease towards 7

Question 26

Diluting an acid by a factor of 10..?

Answer 26

Increases the pH by 1

Question 27

Diluting an alkali by a factor of 10..?

Answer 27

Decreases the pH by 1

Question 28

What do metal oxide that dissolve in water form?

Answer 28

Alkaline solution.

Question 29

What can an acid be neutralised by?

Answer 29

A base

Question 30

What are the 4 bases?

Answer 30

Reactive metals (MAZIT metals) Metal oxide Alkali (metal hydroxide) Metal carbonate.

Question 31

What is the equation for neutralisation with REACTIVE METALS (mazit metals)?

Answer 31

'MAZIT' metal + acid --------> salt + hydrogen

Question 32

What are salts?

Answer 32

Ionic compounds usually made of a positive metal ion and a negative non-metal ion

Question 33

What is the salt formed by HYDROCHLORIC ACID?

Answer 33

Chloride

Question 34

What is the salt formed by NITRIC ACID?

Answer 34

Nitrate

Question 35

What is the salt formed by SULFURIC ACID?

Answer 35

Sulfate

Question 36

What is the salt formed by PHOSPHORIC ACID?

Answer 36

Phosphate

Question 37

What is the equation for neutralisation with METAL OXIDE?

Answer 37

Metal oxide + acid ---------> salt + water

Question 38

What is the equation for neutralisation with METAL CARBONATE?

Answer 38

Metal carbonate + acid --------> salt + carbon dioxide + water

Question 39

What is the equation for neutralisation with METAL HYDROXIDE?

Answer 39

Acid + metal hydroxide (Alkali) --------> salt + water

Question 40

What are: Ionic compounds usually made of a positive metal ion and a negative non-metal ion?

Answer 40

Salts

Question 41

What is the equation for titration?

Answer 41

c1v1/ n1 = c2v2/n2

Question 42

What is GRAM FORMULA MASS?

Answer 42

Gram formula mass is the mass of one mole of a substance.

Question 43

What does the triangle for MOLES TO MASS OR MASS TO MOLES look like?

Answer 43

m (mass of substance, g) n (no. of moles, mol) / gfm (gram formula mass,g)

Question 44

What is the equation for MOLES TO MASS OR MASS TO MOLES?

Answer 44

m= n x gfm

Question 45

What does the triangle for CALCULATING THE CONCENTRATION OF A SOLUTION look like?

Answer 45

n (number of moles, mol) c (concentration, moll/l) / V (volume, litres L)

Question 46

What is the equation for CALCULATING THE CONCENTRATION OF A SOLUTION?

Answer 46

n= c x V

Question 47

Revise how to calculate based on balanced equations.

Answer 47

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