Group 2

Question 1

How does atomic radius change down group 2?

Answer 1

Increases due to the extra shells, nuclear attrition

Question 2

How does IE change down group 2?

Answer 2

decreases
Extra shells, more shielding, weaker, attraction, easier to remove electron so less energy is required

Question 3

How does melting point change down group

Answer 3

↓

Question 4

How does group 2 elements react with water

Answer 4

They produce metal hydroxides and hydrogen

Question 5

Magnesium reaction with steam + observation

Answer 5

Mg + H2O → Mg(oh) + H2
Magnesium burns into A white flame and magnesium oxide produces A white powder

Question 6

Magnesium reaction with warm water

Answer 6

Mg + 2H20 → mg (OH) 2 + H2

Question 7

Observations for the reachons with group 2 metals t water

Answer 7

Fizzing, metal dissolves, solution heats up, with calcium a white ppt. Is formed

Question 8

Sulfate solubility ___________ down the group

Answer 8

Decrease

Question 9

Hydroxide solubility ________ down the group

Answer 9

Increase

Question 10

Howl to test for sulfates

Answer 10

BaCl2

Question 11

Explain test for sulfate

Answer 11

① add HCI to remove carbonates
② add bacl2 if sulfate present a while ppt. Is formed

Question 12

Extraction of titanium from magnesium

Answer 12

.① titanium ore is converted to titanium chloride using carbon and oxygen
② fractional distillation
③ titanium reduced using magnesium
TiCl4 + 2Mg →Ti + 2Mgcl2

Question 13

Flue gas desulfarusation reagents

Answer 13

CaO and CaCO3

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