group 2

Question 1

trend of hydroxides going down group 2

Answer 1

they become more reactive, so white precipitate will form at the top of group 2 and clear solution for bottom of group 2

Question 2

trend of sulfates going down group 2

Answer 2

they become less reactive, so precipitates will form at the bottom of group 2

Question 3

what is milk of magnesia

Answer 3

magnesiem hydroxide, in which it is used in medicine to treat the excess of acidity in the stomach, as it is alkaline due to the OH, as well as indigestion and constipation

Question 4

what happens when magnesium reacts with water

Answer 4

magnesium hydroxide and hydrogen are formed

Question 5

what happens when magnesium reacts with steam

Answer 5

magnesium oxide and hydrogen are formed

Question 6

what is calcium hydroxide also called and what does it do

Answer 6

it is called slaked lime, and it is used to treat acidic soil

Question 7

trend in melting point going down group 2

Answer 7

lower melting point as you go down group 2, as the atomic radiu increases in which there are weaker electrostatic forces between the nucleus and delocalized electrons

Question 8

properties of titanium

Answer 8

strong, low density, high melting point, and is used in aerospace industry, and in making hip joints

Question 9

why is titanium different to extract than other metals

Answer 9

usually when u react a metal oxide with carbon, it will form the metal and carbon dioxide, however this doesn’t work with titanium, as it will form titanium carbide TiC
metal oxide + carbon—> metal + carbon dioxide

Question 10

how to extract titanium

Answer 10

titanium oxide + cl2 + C —–> titanium chloride + carbon monoxide
take the titanium chloride and react it with magnesium in order to form magnesium chloride and titanium, in which titanium is now extracted

Question 11

what is barium sulfate called and what does it do

Answer 11

called barium meal, and is taken orally in order to outline the gut and coat the tissue, making it easier to see on the x ray
- it is toxic, however it is insoluble so doesn’t get absorbed into the bloodstream

Question 12

how to test for ions

Answer 12

acidify the unknown solution with nitric or hydroclauric acid, then add barium chloride. if sulfate ions are present then barium sulfate will be formed, which would produce a white precipitate