Chemistry Keywords

Question 1

What is Atomic absorbtion spectroscopy used for ?

Answer 1

Detecting concentration of a particular metal in solution.

Question 2

What is infrared spectrometry used for ?

Answer 2

Find the different bonds , e.g C=C in ethane or O-H in ethanol.

Question 3

what is Ultraviolet spectroscopy used for ?

Answer 3

Find the concentration of the substance by finding how much light is absorbed.

Question 4

what is Nuclear magnetic resonance spectroscopy used for

Answer 4

Tell us how the atoms are arranged in a molecule , so tells us the structure. So we can tell the differance between ethanol and ethanal.

Question 5

what is Chromatography used for ?

Answer 5

Gas - liquid seperate compunds that are easily vapourised (e.g distilled water, ethyl alcohol, essential lavender oil, essential bergamot oil.

gel permeaton, seperating according to the molecule size ( e.g methanol, ethanol, propanol, butanol, etc) Ion-exchange seperate compounds containing different charged particles (e.g Iron (ii) chloride and iron (iii) chloride)
High performance separate compounds in solution

Question 6

what is Mass Spectroscopy used for ?

Answer 6

find the relative atomic mass of an atom.

Question 7

Describe the flame test

Answer 7

The metal salt or other compound is mixed with concentrated hydrochloric acid and a sample of the mixture is heated strongly in a bunsen flame on the end of a cleaned nichrome wire

Question 8

Describe the NaOH test

Answer 8

dilute sodium hydroxide (NaOH) solution is added to a solution containing the suspected ion.

Question 9

Describe the Litmus paper test

Answer 9

ammonia: damp red litmus

ammonium ion. smelly ammonia released and red litmus turns blue.

Question 10

Describe the Action of acid

Answer 10

add acid to carbonate and buuble gas through limewater.

Question 11

Describe the Decomposition reaction

Answer 11

Heat carbonate and bubble gas through limewater.

Question 12

Describe the silver nitrate test

Answer 12

add dilute nitric acid and silver nitrate solution. The silver nitrate is acidified with dilute nitrate acid to prevent the precipiation of other non - halide silver salts.

Question 13

Describe BaCl2 / HCi

Answer 13

A white precipate of barium sulfate

Question 14

Describe Al powder / NaOH

Answer 14

Add COLD sodium hydroxide solution and Al powder to the suspected ammonium salt and test any gas above the solution with red litmus.

smelly ammonia released ! and litmus turns blue .

YOU GO GIRL ;)

Question 15

Describe Saturation unsaturation

Answer 15

Bubble gas through, or add liquid to a solution of bromine water. The orange/brown bromine rapidly decolourises, as a saturated colourless organic bromocompound is formed.

Question 16

Describe Indicator

Answer 16

Methyl Orange
Strong acid and weak base
Phenolphthalein
Weak acid and strong base and indicator 
Strong acid and strong base

Question 17

Whats the result of the flame test with barium

Answer 17

yellowish/apple green

Question 18

Whats the result of the flame test with lithium

Answer 18

crimson

Question 19

Whats the result of the flame test with potassium

Answer 19

lilac

Question 20

Whats the result of the flame test with sodium

Answer 20

yellow, slightly orange

Question 21

Whats the result of the flame test with calcium

Answer 21

brick red

Question 22

Whats the result of the flame test with copper

Answer 22

green

Question 23

Whats the result of the NaOH test with calcium

Answer 23

white precipitate

Question 24

Whats the result of the NaOH test with copper (II)

Answer 24

blue precipitate

Question 25

Whats the result of the NaOH test with iron (II)

Answer 25

dark green precipitate

Question 26

Whats the result of the NaOH test with iron (III)

Answer 26

brown precipitate

Question 27

Whats the result of the NaOH test with aluminium

Answer 27

white precipitate

Question 28

Whats the result of the NaOH test with magnesium

Answer 28

white precipitate

Question 29

Whats the result of the litmus test with ammonium NH4*

Answer 29

red litmus turns blue

Question 30

Whats the result of the litmus test with ammonia gas

Answer 30

litmus turns blue

Question 31

Whats the result of the action of acid with carbonates

Answer 31

Fizzes

Question 32

Whats the result of the action of acid with copper carbonate

Answer 32

Blue solution, co2 gas evolved (limewater = milky)

Question 33

Whats the result of the action of acid with zinc carbonate

Answer 33

colourless solution, co2 gas evolved (limewater = milky)

Question 34

Whats the result of the Decompostition reaction with copper carbonate

Answer 34

Black solid co2 gas evolved (limewater = milky)

Question 35

Whats the result of the Decompostition reaction with zinc carbonate

Answer 35

yellow solid turns white on cooling , co2 gas evolved (limewater = milky)

Question 36

Whats the result of the silver nitrate test with chloride

Answer 36

white precipitate

Question 37

Whats the result of the silver nitrate test with Bromide

Answer 37

cream precipitate

Question 38

Whats the result of the silver nitrate test with iodide

Answer 38

yellow precipitate

Question 39

Whats the result of the BaCl2 / HCl reaction with sulfate

Answer 39

white precipitate

Question 40

Whats the result of the Al powder/NaOH with Nitrate test

Answer 40

forms ammonia litmus turns blue

Question 41

Whats the result of Burning with organic compounds

Answer 41

burn or gets charred