Chemical Analysis

Question 1

Formulations?

Answer 1

mixtures, they have different compounds in specific proportions

Question 2

Formulations would include?

Answer 2

fuels, cleaning agents, paints, alloys, fertilizers , and food

Question 3

Chromatography

Answer 3

Method to separate different components in a mixture.

Question 4

Rf value equation?

Answer 4

distance moved by substance/ distance moved by solvent

Question 5

Hydrogen

Answer 5

lighted splint > squeaky pop

Question 6

Oxygen

Answer 6

glowing splint > splint re-lights

Question 7

Chlorine

Answer 7

damp litmus > bleaches

Question 8

Carbon Dioxide

Answer 8

lime water > turns milky

Question 9

Aluminium ions 3+

Answer 9

addition of excess sodium hydroxide solution > white precipitate does dissolve

Question 10

Calcium ions 2+

Answer 10

addition of excess sodium hydroxide solution > white precipitate does not dissolve

Question 11

Magnesium ions 2+

Answer 11

addition of excess sodium hydroxide solution > white precipitate does not dissolve

Question 12

Copper (ii) ions 2+

Answer 12

blue precipitate

Question 13

iron (ii) ions 2+

Answer 13

green precipitate

Question 14

iron (iii) ions 3+

Answer 14

brown precipitate

Question 15

Carbonate 2-

Answer 15

dilute acid > carbon dioxide (tested with lime water)

Question 16

Chloride 1-

Answer 16

silver nitrate solution in the presence of nitric acid > white precipitate

Question 17

Bromide Br -

Answer 17

silver nitrate solution in the presence of nitric acid > cream precipitate