When lithium reacts with water, it produces lithium hydroxide and hydrogen gas. The lithium metal may also appear to move around or float on top of the water due to its low density. This reaction is exothermic, meaning it releases heat.
2Li (s) + 2H2O(l) = 2LiOH(aq) + H2(g) The products are lithium hydroxide and hydrogen . Visually, when a pellet of lithium is placed on the water surface, it will gently effervese (fizz). NB For any Group 1 metal (M) , Na, K , Rb, Cs, Fr. 2M(s0 + 2H2O = 2MOH(aq) + H2(g) This reactions become more violent on going down the group . Fr (Francium) is never done in the open lab, because Francium is radio-active.
lithium is the smallest element. it is much harder and muchlighter than other alikli metals. salts of lithiun are insoluble in water bcoz of high stablity. it reacts slowly with water. it forms normal oxide with oxygen while other form per oxide or super oxide. it is least reactive
physical characteristics of lithium: it has the ability to float on water because of its low density; and because its so soft, you can cut it with a knife. chemical characteristics of lithium: when combined with water, produces hydrogen gas; and when combined with oxygen, it forms lithium oxide
To make an 18.0% solution, you would need to add 18.0 g of lithium nitrate per 100 g of solution. This means you require 5.4 g of lithium nitrate for 30.0 g of water.
LiOH is a Base because of the OH. In a reaction it will try to pull a Hydrogen (H) from another molecule to make water (h2o)
Hydrogen
2Li (s) + 2H2O(l) = 2LiOH(aq) + H2(g) The products are lithium hydroxide and hydrogen . Visually, when a pellet of lithium is placed on the water surface, it will gently effervese (fizz). NB For any Group 1 metal (M) , Na, K , Rb, Cs, Fr. 2M(s0 + 2H2O = 2MOH(aq) + H2(g) This reactions become more violent on going down the group . Fr (Francium) is never done in the open lab, because Francium is radio-active.
lithium is the smallest element. it is much harder and muchlighter than other alikli metals. salts of lithiun are insoluble in water bcoz of high stablity. it reacts slowly with water. it forms normal oxide with oxygen while other form per oxide or super oxide. it is least reactive
Water. ---------- Oxygen
Water and sulfur
physical characteristics of lithium: it has the ability to float on water because of its low density; and because its so soft, you can cut it with a knife. chemical characteristics of lithium: when combined with water, produces hydrogen gas; and when combined with oxygen, it forms lithium oxide
Aluminium foil, sodium hydroxide
Dissolve into water and it actually reacts with the water to form H3PO4, phosphoric acid.
If you're floating metal on water, there are only a couple or three metals that have a density so low that they'll float on water. Those metals are lithium, potassium and sodium. Any one of these will float on water, and they are listed in order of increasing density with sodium just a bit less dense than water. Note that all of these metals will react violently with water, so we're setting this issue aside here. Be clear about that.
To make a 2 molal solution, you would need 2 moles of lithium sulfide per 1000g of water. Since you have 1600g of water, you need 2 x (1600 / 1000) = 3.2 moles of lithium sulfide. To find the grams needed, you would multiply the molar mass of lithium sulfide (45.94 + 32.06) by the number of moles needed (3.2) to get 149.12 grams.
To make an 18.0% solution, you would need to add 18.0 g of lithium nitrate per 100 g of solution. This means you require 5.4 g of lithium nitrate for 30.0 g of water.
lithium fluoride, LiF