-
Anonymous users2024-02-16White precipitate: barium sulfate baso4, silver chloride AGCL, calcium carbonate caCO3, barium carbonate baCO3;
Blue precipitate: copper hydroxide Cu(OH)2;
Reddish-brown precipitate: iron hydroxide Fe(OH)3
It is enough to keep the above four in mind. 】
-
Anonymous users2024-02-15CuSO4+2NaOH=Cu(OH)2 +Na2SO4 blue precipitate generation, the upper part is a clear solution Mass conservation law experiment.
Ca(OH)2 + CO2 = CaCO3 + H2O Clarified lime water becomes turbid, apply CO2 inspection and lime mortar to paint the walls.
Ca(HCO3)2δ CaCO3 +H2O+CO2 white precipitation, produces gas that makes the clarified lime water turbid, scale formation. Formation of stalactites.
HCl+AGnO3= AGCL+HNO3 Produces white precipitate, insoluble in dilute nitric acid The principle of testing Cl—.
Ba(OH)2+ H2SO4=BASO4 +2H2O produces a white precipitate, insoluble in dilute nitric acid The principle of testing SO42—.
BaCl2 + H2SO4 = BaSO4 + 2HCl Generate white precipitate, insoluble in dilute nitric acid Test the principle of SO42-.
Ba(NO3)2+H2SO4=BASO4 +2HNO3 Generate white precipitate, insoluble in dilute nitric acid The principle of testing SO42—.
FeCl3+3NaOH = Fe(OH)3 +3NaCl solution fades yellow and has reddish-brown precipitate.
AlCl3+3NaOH = Al(OH)3 +3NaCl has a white precipitate to form.
mgcl2+2naoh = mg(oh)2↓+2nacl
CuCl2+2NaOH = Cu(OH)2 +2NaCl solution fades blue and has a blue precipitate.
CaO+ H2O = Ca(OH)2 white bulk solid becomes powder, quicklime to prepare lime slurry.
Ca(OH)2 + SO2=CASO3 + H2O has a white precipitate to generate in junior high school.
Ca(OH)2+Na2CO3=CaCO3 +2NaOH has a white precipitate to produce industrial caustic soda and a small amount of laboratory caustic soda.
Ba(OH)2+Na2CO3=BaCO3 +2NaOH has a white precipitate to form.
Ca(OH)2+K2CO3=CaCO3 +2koH has a white precipitate to form.
AgNO3+NaCl = AGCl +Na NO3 white precipitate insoluble in dilute nitric acid (similar reaction to other chlorides) It is used to test chloride ions in solutions.
BaCl2 + Na2SO4 = BaSo4 + 2NaCl white does not dissolve in the precipitate of dilute nitric acid (other sulfate-like reactions) It is used to detect sulfate ions.
CaCl2+Na2CO3= CaCO3 +2NaCl has a white precipitate to form.
MgCl2+Ba(OH)2=BaCl2+Mg(OH)2 is formed with a white precipitate.
How can there be such a problem? That's a question that can be difficult for physicists! >>>More
There are two types of colors seen by the human eye, one is transmitted light and the other is scattered light. >>>More
The concentration of the sulfuric acid solution (mass fraction. >>>More
Actually, what you mean is that you may not be able to tell which is on top and what is on the bottom in extraction >>>More
After dilution of acetic acid with water, its concentration decreases, the acidity of the solution decreases, and the pH increases. After adding sodium acetate crystals, the concentration of acetate ions in the solution increases, and due to the homoionic effect, the ionization equilibrium of the original acetic acid molecules moves to the direction of the reverse reaction (inhibits ionization), the concentration of hydrogen ions decreases, and the pH also increases. >>>More