Flame Test

Question 1

Flame test method

Answer 1

Use a clean nichrome wire to mix a sample of a solid compound with a few drops of conc. HCl

Question 2

Sodium

Answer 2

Yellow

Question 3

Potassium

Answer 3

Lilac

Question 4

Calcium

Answer 4

Orange

Question 5

Barium

Answer 5

Green

Question 6

Lithium

Answer 6

Red

Question 7

Strontium

Answer 7

Crimson red

Question 8

Rubidium

Answer 8

Red violet

Question 9

Chromium in addition of sodium hydroxide

Answer 9

Green precipitate
Cr(H20)3(OH)3

Question 10

Chromium in addition of sodium hydroxide in excess

Answer 10

Precipitate dissolves
Green precipitate
Cr(H20)2(OH)4

Question 11

Chromium in addition of aqueous ammonia

Answer 11

Green ppt

Cr(H20)3(OH)3

Question 12

.

Question 13

Manganese addition of sodium hydroxide

Answer 13

White ppt Mn(OH)2 but turns brown on standing in air

Question 14

Manganese addition of sodium hydroxide in excess

Answer 14

Precipitate insoluble

Question 15

Manganese addition of a aquotes ammonia

Answer 15

White ppt but turns brown upon standing in air

Question 16

Manganese addition of aqueous ammonia in excess

Answer 16

Ppt is insoluble

Question 17

Fe2+ in addition to sodium hydroxide

Answer 17

Green ppt that turns brown upon standing in air

Question 18

Fe2+ in addition of sodium hydroxide in excess

Answer 18

Precipitate is insoluble in excess

Question 19

Fe2+ in addition of aqueous ammonia

Answer 19

Pale Green ppt that turns brown upon standing

Question 20

Fe2+ in addition of aqueous ammonia in excess

Answer 20

Ppt is insoluble in excess

Question 21

Fe3+ in sodium hydroxide and in excess

Answer 21

Red-brown ppt and insoluble in excess

Question 22

Fe3+ in aqueous ammonia and in excess

Answer 22

Red brown ppt and insoluble in excess

Question 23

Nickel in sodium hydroxide in excess

Answer 23

Green ppt And insoluble in excess