Group 2 and Group 7 Metals

Question 1

Describe to me the solubility of hydroxides

Answer 1

Solubility increases down the group

Question 2

What is magnesium hydroxide used for

Answer 2

Antacid or to neutralise acidic solids

Question 3

What is the solubility of sulfates

Answer 3

Decreases in solubility down the group

Question 4

How is titanium extracted

Answer 4

Magnesium is used in the extraction of titanium via displacement reaction

Question 5

flue gas removal

Answer 5

CaO+2H2O+SO2—–>CaSO3 +2H2O

Calcium oxide reacts with sulfur dioxide to remove it from factory pollutants this forms calcium sulfite and water

Question 6

Group 2 atomic radius patterns

Answer 6

Atomic radius inc

Question 7

Group 2 reactivity

Answer 7

Shielding inc going down group so outer e easier to loose so group 2 inc on reactivity

Question 8

whathappens to an atiom when Ionisation energy decreases

Answer 8

Greater atomic radius inc shielding so less ionising energy

Question 9

Group 2 melting point trends

Answer 9

Dec down group. Attractive forces act over larger distancesso they are weaker

Question 10

Atomic radius trend for g7

Answer 10

Inc going down group

Question 11

Reactivity for g7

Answer 11

Reactivity decreases

Question 12

Boiling point for g7

Answer 12

Simple covalent molecules
heldtogether by van der waals intermolecular force inc as ar inc so strength of vdw incso bp inc

Question 13

Oxidising power for g7

Answer 13

Decreases going down group 7

Question 14

Will iodine displace any halide ions

Answer 14

No ioneine does not displace any halide ions

Question 15

Halide ions reducing agent trend going down the group

Answer 15

Reducing agent power increases going down the group the greater the reducing power the longer the reaction

Question 16

Give me the reactions between fluoride and chloride ions

Answer 16

NaF + H2SO4 —> NaHSO4 + HF
NaCl + H2SO4 —> NaHSO4 + HCl

Question 17

Bromide ions reaction

Answer 17

NaBr +H2SO4 —>NaHSO4 +HBr
2HBr +H2SO4 —> Br2 + SO2 +2H2O

Question 18

Iodide ions reactions

Answer 18

NaI+H2SO4—->NaHSO4 +HI
2HI +H2SO4 —-> I2 + SO2 + 2H2O
6HI + SO2 —-> H2S + 3I2 + 2H2O

Question 19

how is SO4 2-
tested for

Answer 19

Tested for using BaCl2 forms a white precipitate

Question 20

Hydroxide test

Answer 20

red litmus turns blue

Question 21

If a carbonate test

Answer 21

Add hcl, will fizz CO2 gas given off collect gas bubble through like water will turn cloudy

Question 22

Calcium flame test result

Answer 22

Brick red

Question 23

Strontium flame test result

Answer 23

Red

Question 24

Barium flame test result

Answer 24

Pale green

Question 25

How to show calcium hydroxide is soluble

Answer 25

Take a known volume of the saturated solution
Evaporate the filtrate to dryness
Weigh the residue

Question 26

Using concentrated sulphuric acid to test for F- ion result

Answer 26

Steamy acidic fumes (HF produced)

Question 27

Cl- ion H2SO4 test result

Answer 27

Steamy acidic fumes of HCl

Question 28

Br- H2SO4 test result

Answer 28

Steamy acidic fumes contaminated with brown bromine vapour

Question 29

I- ion H2So4 positive result

Answer 29

Some steamy fumes (of HI), but lots of purple iodine vapour (plus various red colours in the tube)