Q1

Question 1

NAME OF TEST TO TEST FOR PRESENCE OF CHLORIDE IONS IN AQUEOUS SOLUTION

Answer 1

SILVER NITRATE TEST

Question 2

How to test for the cl ions in Aq solution (process)

Answer 2

Few drops of dilute nitric acid (HNO3)
Few drops of silver nitrate (AgNO3)

IIf CL ions present, white precipitate of silver will form.

Cl
−
(aq)+Ag
+
(aq)→AgCl(s)

Question 3

State avogadros law.

Answer 3

Same volumes of gases at same temperature and pressure will contain the same n# of molecules.

Question 4

Why is Bronsted Lowry better than Arrhenius?

Answer 4

1. Bronsted has better defintion of acids and bases [ ACIDS = PROTON DONOR ] [ BASES = PROTON ACCEPTOR ]
2. Bronsted can be applied to reactions in non-aqueous solvents. Arrhenius is limited to aqueous.

Question 5

How many neutons and electrons are in ion (56) Fe 2+

Answer 5

Atomic number of Fe is 26 ( smaller n# )
Mass (big) number = 56

-atomic number- Protons = 26.

Neutral Fe atom would have 26 -> we have the 2+ , missing 2 electrrons.

26 - 2 = 24.

Neutrons = mass - atomic = 30 NEUTRONS

Question 6

How many atoms are present in 2 moles of ammonia

Answer 6

Ammonia = NH3

1 N, 3 H atoms.

N# of molecules in 1 mole = 6x10^23 [AVOGADRO N#]

4 atoms total per molecule (1N + 3H)
–> 4 * [AVOGADRO] = … x 2moles = 4.818 x10^24

Question 7

What is the shape of H20 and why

Answer 7

Planar V shape - 2 bond pairs 2 lone pairs

Question 8

How many valence (outer-shell) electrons does Oxygen have

Answer 8

6

Question 9

How many BP-LP in Tetrahedral

Answer 9

4, 0

Question 10

How many BP-LP in Pyramidal

Answer 10

3, 1

Question 11

How many BP-LP in Planar V shape

Answer 11

2, 2

Question 12

How many BP-LP in Trigonal planar

Answer 12

3, 0

Question 13

Linear - How many BP LP?

Answer 13

2,0

Question 14

2 bond pairs, 2 Lone pairs. Name the shape.

Answer 14

104.5degs. Planar V shape ! 2,2

Question 15

3 BP, 0 LP, name shape type

Answer 15

trigonal planar, 120degs