MindMap Gallery Sodium carbonate and sodium bicarbonate
Mind map of sodium carbonate and sodium bicarbonate. The common names are NaHCO3: baking soda, Na2CO3: soda ash (not alkali, but salt), soda. I hope this mind map will be helpful to you.
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
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Sodium bicarbonate and sodium bicarbonate
Compare
physics
common name
NaHCO3: baking soda Na2CO3: Soda ash (not alkali, but salt), soda
color
NaHCO3 fine white powder Na2CO3 white powder
Alkaline strength
Na2CO3>NaHCO3
solubility
Na2CO3 is easily soluble in water NaHCO3 has low solubility in water and can easily absorb white crystals
Thermal stability
Na2CO3 has strong thermal stability
Sodium carbonate and sodium bicarbonate cannula experiment
Chemical
Reacts with NaOH
Na2CO3 does not react NaHCO3 NaOH=Na2CO3 H2O
Hou's method of making alkali
Making Na2CO3 ① Pour ammonia and carbon dioxide into the saturated salt water in sequence (ammonia 1:700 has a high solubility, making the solution alkaline and increasing the amount of carbon dioxide absorbed) ② There is a large amount of NH4, Na, Cl-, CO3²-, HCO3- in the solution ③NaHCO3 has low solubility and precipitates first ④Heating
Reacts with strong bases Ca(OH)2, Ba(OH)2
All react to form precipitated CaCO3.BaCO3
Reacts with soluble calcium salts and barium salts
Na2CO3 produces precipitation NaHCO3 does not precipitate
Transformation of the two
①Na2CO3 CO2 H2O=2NaHCO3 Na2CO3 HCl=NaHCO3 NaCl ②NaHCO3=Heating Na2CO3 H2O CO2 NaHCO3 NaOH=Na2CO3 H2O
use
Na2CO3
NaHCO3
identify
solid
add acid
What quickly creates bubbles is sodium bicarbonate
heating
What creates bubbles and turns clear limewater cloudy is sodium bicarbonate
solubility
Na2CO3>NaHCO3
solution
Use pH test paper
The more alkaline the higher the pH value
Add soluble calcium salt barium salt
Na2CO3 produces white precipitate
add acid
What bubbles up immediately is NaHCO3
Remove impurities
Na2CO3 solid (NaHCO3), heated
When using Na2CO3 solution (NaHCO3), add an appropriate amount of sodium hydroxide solid, NaHCO3 NaOH=Na2CO3 H2O
NaHCO3 solution (Na2CO3), add carbon dioxide