Molecular Shapes + Inorganic Ions Tests

Question 1

2,0

Answer 1

Linear

Question 2

3,0

Answer 2

Trigonal planar

Question 3

4,0

Answer 3

Tetrahedral

Question 4

5,0

Answer 4

• trigonal bipyramidal

Question 5

6,0

Answer 5

Octagonal

Question 6

2,1

Answer 6

Bent / v shape

Question 7

3,1

Answer 7

Trigonal pyramidal

Question 8

2,2

Answer 8

Bent / v shape

Question 9

3,2

Answer 9

T shape / trigonal planar

Question 10

4,2

Answer 10

Square planar

Question 11

4,1

Answer 11

Seesaw

Question 12

Test for group 2 elements + results

Answer 12

Add excess Sodium hydroxide to see ppt forms
Mg = white ppt
Ca= slight white ppt
Sr= slight white ppt
Ba= no change = clear solution

Question 13

Test for ammonium ion + results

Answer 13

Add sodium hydroxide and heat up in water bath = form Ammonia gas
Test ph with damp red litmus paper = should bleach it to turn blue

Question 14

Test for sulfate ions

Answer 14

Use acidified barium chloride
= form white ppt and barium sulfate forms which is very insoluble

Question 15

Test for hydroxide ions

Answer 15

Use damp red litmus paper
= turns blue if present as OH- is alkaline

Question 16

Test for halide ion

Answer 16

Add nitric acid then silver nitrate
Cl forms white ppt as silver chloride forms
Br forms cream ppt as silver bromide forms
I forms yellow ppt as silver iodide forms

Question 17

Test for carbonate ions + result

Answer 17

Add hydrochloric acid will causes solution to fizzes because carbonate ion react with hydrogen ion = form CO2. CO2 test with lime water, will turn cloudy