- Sodium bicarbonate (baking soda) and water.Dishes for calcination.Gas garelka.Glassware for alkaline solution.Glass or steel rod, blade or spoon.
Obtain sodium bicarbonate.In fact, this is the usual baking soda.It is sold in almost any store.
Prepare dishes for calcination.It is better if it is heat-resistant glass cookware or ceramic crucible.It is also possible to use steel tanks.In extreme cases, your regular table spoon or an empty tin can.For dishes required holder, excluding burn your hands when it is heated.
Spend thermal decomposition reaction o
f sodium bicarbonate.Put a little sodium bicarbonate in a bowl for the calcination.Heat the dish on a gas burner.It is possible to heat over medium heat for household gas stoves - the temperature will be sufficient.On the progress of the reaction can be judged by some of the "boiling" of the powder in a pot because of the rapid release of carbon dioxide.Wait for the reaction.In bowl formed sodium oxide.
Cool dishes oxide solution to room temperature.Just move the dish on refractory stand, or turn off the gas burner.Wait until it cools down.
Fill a glass bowl with water.It should be a container with a wide mouth.You can use plain glass jar.
Get sodium hydroxide in aqueous solution.With constant stirring, sprinkle in small portions sodium oxide in water.Stirring produces glass or steel rod or spatula.
Tip 2: How to get the iron hydroxide
Iron is the second most abundant metal in nature (after aluminum).In the free state it can only occur in meteorites that fall to Earth.Iron relates to an essential trace element in the human body.
- ferrous sulfate, potassium hydroxide, hydrochloric acid
Use reacting salts of divalent iron with alkali.Connect ferrous sulfate iron and potassium hydroxide KOH.It is formed of gray-green precipitate hydroxide divalent iron .
Add to the mix a solution of hydrochloric acid. hydroxide precipitate dissolved iron.Formed chloride solution ( hydroxide ) iron dvuhvalentnogo.Gidroksid ferrous iron is used for the purification of waste water from arsenic and used in non-ferrous metallurgy and chemical industry.Purification occurs by sorbent produced based on iron hydroxide (II) and perchlorovinyl a ratio of 80% to 20%, respectively.This allows treatment of wastewater to the level of the maximum permissible kontsentratsii.Preparaty iron, in the remainder of which are salts or hydroxide trivalent iron, helps the human body to fight the disease iron deficiency anemia.It is not just a reduction of hemoglobin, ie,below 120 g / l, and a disease that affects various organs and systems of the body, breaks some functions imeeet certain clinical manifestations and require treatment.The need for iron increases during intense physiological growth, both in the first months of life and during adolescence.Women need special hardware is required during menstruation, during pregnancy, with the development of the embryo and during lactation.Leading Russian doctors seeing an increase in iron-deficiency anemia in children under the age of one year, adolescents and pregnant women.
- Getting iron hydroxide
Do not use sodium bicarbonate calcination tube.Due to the rapid passage of the thermal decomposition reaction of the matter may be ejected from the tube under the pressure of carbon dioxide formed.Work gloves and safety goggles.Avoid sodium oxide to the skin of the body.It will react with the moisture of the skin to form a hydroxide.This could cause burns.Avoid sodium hydroxide solution to the skin for the same reason.
To test the resulting alkaline solution of sodium hydroxide can be used phenolphthalein.Phenolphthalein tablets are sold in pharmacies.Dissolve the tablet in a small amount of ethyl alcohol, and you get a light alkaline state of the environment.
- obtaining sodium hydroxide