inorganic chemistry and the periodic table

Question 1

what happens to the reactivity of the group 2 metals down the group

Answer 1

increases

Question 2

why does the reactivity of group 2 increase down the group

Answer 2

• atomic radii increases, so more shielding
• nuclear attraction decreases
• easier to lose electrons and form cations

Question 3

what happens to the oxidising strength as you go down group 7

Answer 3

decreases

Question 4

what happens to the reducing agent strength as you go down group 7

Answer 4

increases

Question 5

what happens to the oxidising agent strength as you go down group 7

Answer 5

decreases

Question 6

what are the equations when fluoride or chloride salts reacts with concentrated sulfuric acid?

Answer 6

NaF(s) + H₂SO₄(l) -> NaHSO₄(s) + HF(g)

Question 7

what type of reaction is it when flouride or chloride salts react with concentrated sulfuric acid

Answer 7

acid-base

Question 8

what are the equations when a bromide salt reacts with concentrated sulfuric acid?

Answer 8

1. (ACID-BASE STEP)
   NaBr(s) + H₂SO₄(l) -> NaSO₄(s) + HBr(g)
2. (REDOX STEP)
   2HBr(g) + H₂SO₄(l) -> Br₂(g) + SO₂(g) + 2H₂O(l)

Question 9

what is the half equation for an oxidation reaction when a bromide reacts with sulfuric acid?

Answer 9

2Br⁻ -> Br₂ + 2e⁻

Question 10

what is the half equation for an reduction reaction when a bromide reacts with sulfuric acid?

Answer 10

H₂SO₄ + 2H⁺ + 2e⁻ -> SO₂ + 2H₂O

Question 11

what are the observations made when a bromide salt reacts with sulfuric acid?

Answer 11

• white steamy fumes of HBr are evolved
• red fumes of bromine are also evolved and a colourless, acidic gas (SO₂)

Question 12

what are the observations made when a fluoride salt reacts with sulfuric acid

Answer 12

white steamy fumes of HF

Question 13

what are the observations made when a chloride salt reacts with sulfuric acid

Answer 13

white steamy fumes of HCl

Question 14

What are the reduction products when a bromide salt reacts with sulfuric acid

Answer 14

SO₂

Question 15

What are the reduction products when an iodide salt reacts with sulfuric acid

Question 16

describe the solubility trend of the hydroxides down group 2

Answer 16

the solubility increases

Question 17

describe the solubility of the sulphates down group 2

Answer 17

the solubility decreases

Question 18

which group 2 oxide is insoluble

Answer 18

beryllium oxide

Question 19

which group 2 oxide is insoluble

Answer 19

barium sulphate

Question 20

why are group 2 compounds less thermally stable than group 1

Answer 20

• higher charge
• greater distortion to the anion
• less stable the carbonate/nitrate compound becomes