Yr10

Question 1

What does positive hydrogen ions (acid) + negative hydrogen ion (alkali) equal?

Answer 1

Neutral water

Question 2

What does dissociate mean?

Answer 2

Splitting

Question 3

What does a strong acid do when placed in a solution?

Answer 3

Every individual molecule dissociate when placed in a solution this means it may have a PH of 1

Question 4

What does a weak acid do when placed in a solution?

Answer 4

Not all of the molecules dissociate some still stay together this means it may have a PH of 5 or 6

Question 5

What is a base?

Answer 5

Bases are chemicals that can neutralize acids

Question 6

What are the three common salts that make all soluble?

Answer 6

-sodium
-potassium
-ammonium

Question 7

What makes all salts soluble?

Answer 7

Nitrates

Question 8

What makes most salts soluble

Answer 8

Chlorides and sulfates

Question 9

What are the exceptions that make chlorides insoluble?

Answer 9

-silver chloride
-lead chlorides

Question 10

What the exception that makes sulfates insoluble?

Answer 10

-lead sulfates
-barium sulfate
-calcium sulfate

Question 11

What is an ion?

Answer 11

Is an atom or group of atoms that has a electrical charge, either positive or negative

Question 12

What is a positive ion?

Answer 12

An atom that loose electrons so has more protons meaning it is positive as protons are positive

Question 13

What is a negative ion?

Answer 13

An atom that gains electrons so has more electrons then protons meaning it has a negative charge as electrons are negative

Question 14

What are the properties of a diamond?

Answer 14

Very hard
Very high melting point due to strong bonds
Cannot conduct electricity (no free electrons)

Question 15

What are the properties of graphite?

Answer 15

Soft and slippery
Weak forces of attraction easily broken
Can conduct electricity

Question 16

What is malleable?

Answer 16

When bent or hit the layers of ion in a metal can slide over each other

Question 17

How to obtain a clear dry preciptate?

Answer 17

Filter the solution
Rinse the precipitate with distilled water
Dry sample in a warm oven

Question 18

How to make soluble salts?

Answer 18

-Filter solution
-Collect filtrate, evaporate the water
-Allow it to crystallize and pay dry any access water

Question 19

What are the steps to make the empirical formula?

Answer 19

-Mass
-Relative atomic mass
-Divide them
-Divide by the smallest value out of the 2 elements
-Put these 2 number by the symbols to make a formula

Question 20

What is metallic bonding?

Answer 20

The bonding between 2 metal elements

Question 21

What is ionic bonding?

Answer 21

The bonding between metal and non metal elements

Question 22

What is covalent bonding?

Answer 22

The bonding between 2 non metal elements

Question 23

What is the difference between each pH?

Answer 23

X10 going towards 1
Divide by ten going towards 14

Question 23

What is titration?

Answer 23

Adding and acid or alkaline to to a solution until it changes colour or neutralizes

Question 24

What is the relative formula mass of Ca(OH)2?

Answer 24

40+(1+16)x2
40+(17)x2
40+34=74

Question 25

What is the relative formula mass of Al2(SO4)3

Answer 25

54+(32+64)x3
54+(96)x3
54+288=342

Question 26

What is the relative formula mass of H2SO4?

Answer 26

1x2+32+16x4
2+32+64=98

Question 27

What is the equation for moles

Answer 27

mass divided by molor mass