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The basis for selecting different generating devices for hydrogen peroxide oxygen production and potassium permanganate oxygen production is __________,________. The advantages of hydrogen peroxide oxygen production compared with heating potassium permanganate oxygen production are __________;________. Dry ice can be used for artificial rainfall, as refrigerant, the principle is ____________,__________. The basis for selecting different generating devices for hydrogen peroxide oxygen production and potassium permanganate oxygen production is __________,________. Compared with heating potassium permanganate oxygen production heating potassium permanganate oxygen production are __________;________. Dry ice can be used for artificial rainfall, as refrigerant, the principle is ____________,__________.
The basis for selecting different generating devices for producing oxygen from hydrogen peroxide and potassium permanganate is (reactant state) and (reaction condition). Compared with heating device for producing oxygen from potassium permanganate, the advantages of hydrogen peroxide and potassium permanganate are (no heating is required and energy is saved) and (they can be switched on and off at the same time).
Dry ice can be used for artificial rainfall and as a refrigerant. Its principle is (when it becomes a gas, it can absorb a large amount of heat and make water vapor condense into liquid water due to temperature reduction),(when it becomes a gas, it can absorb a large amount of heat and make temperature decrease).
IONIC EQUATION OF REACTION OF Ca (HCO3)2 WITH EXCESS Ca (OH)2 SOLUTION Why can't it be Ca2++ HCO3-+2 OH -========= CaCO3(precipitation symbol)+ CO32-+2HO2?
Ca (2+)+HCO3-+OH-=CaCO3 precipitation +H2O
Ps: if you're like that, there's still Ca (2+) left, and it continues to reflect the formation of CaCO3
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- 1. Continuous introduction of SO2 into clarified lime water SO2 continuous introduction of clarified lime water
- 2. What is the chemical formula of the compound formed by sulfur ions and sodium ions
- 3. The problem of boiling point of alkali metal From top to bottom of the periodic table of alkali metals, the relative atomic mass increases, i.e. the intermolecular force increases constantly, the melting boiling point increases, but in fact, the melting boiling point decreases. Why?
- 4. When there are MgCl2, NaSO4 there are MgCl2, NaSO4 and CaCL2 in NaCl to remove impurities with NaOH Na2CO3 BaCL2 Why there are MgCl2, NaSO4 and CaCL2 in NaCl to remove impurities with NaOH Na2CO3 BaCL2, why does bacl2 have to be excessive
- 5. The mass of the brominated carbon tetrachloride solution was increased by 8.4 g after the mixture of 11.2 L (standard condition) ethylene and ethane was introduced into a sufficient amount of brominated carbon tetrachloride solution. A mixture of 11.2 L (standard condition) ethylene and ethane is introduced into a sufficient amount of bromine-based carbon tetrachloride solution. After a sufficient reaction, the mass of bromine-based carbon tetrachloride solution is increased by 8.4 g to obtain the mass ratio of ethylene to ethane in the raw gas mixture. A mixture of 11.2 L (standard condition) ethylene and ethane is introduced into a sufficient amount of bromine-based carbon tetrachloride solution. After the reaction, the mass of bromine-based carbon tetrachloride solution is increased by 8.4 g to obtain the mass ratio of ethylene to ethane in the raw gas mixture.
- 6. Can carbon tetrachloride solution of aldehyde and bromine react? What is the equation Can the carbon tetrachloride solution of aldehyde and bromine react? What is the equation
- 7. What is wrong with the phrase that both benzene and ethylene can fade bromine-based carbon tetrachloride solutions?
- 8. Ion Equation for the Reaction of ca (oh)2 with Nahco 3 Ion Equation for the Reaction of ca (oh)2 Solution with Nahco 3 Solution
- 9. Ion Equation for the Reaction of SO3 with Ca (OH)2
- 10. Classification of the following substances:ca cl2 cacl2 H2so4 cao caco3 ca (oh)2
- 11. CO2+ NaClO + H2O == NaHCO3+ HClO Why not sodium carbonate?
- 12. The following statement is true:______.(insert the letter before the correct option) A. Single crystals and polycrystals have a fixed melting point, and amorphous bodies have no fixed melting point B. The physical properties of single crystals and polycrystals are anisotropic and amorphous C. Beads are spherical, due to surface tension D. If the temperature of a bubble rises from the bottom of the lake to the surface of the lake remains the same, the entropy of the gas system in the bubble increases.
- 13. Why don't amorphous crystals have a fixed melting point?
- 14. Does the amorphous have a melting point, if not, then when the amorphous melts, should call it why Does amorphous have a melting point, if not, then when amorphous melts, should call it why
- 15. What is the common crystal non-crystal and how much is the melting point?
- 16. Why don't amorphous crystals have a definite melting point? Why? Why? Why? Why? Why? Why? Why?
- 17. Include nitrate ion, per ion, nitrite ion, hydroxide ion example, lactate ion, Include nitrate ion, per radical ion, nitrite ion, hydroxide ion example,ate ion, each of five chemical formulas
- 18. Oxygen, chloride, nitrate, carbonate, hydroxide, sulfate, sulfite, bicarbonate, phosphate and ammonium, ferrous (Connection problem): Chemical formula and name of iron ion, copper ion, aluminum ion, calcium ion, magnesium ion and zinc ion
- 19. As for the chemical formula hydroxide radical, sulfate radical, carbonic acid radical, nitrate radical and ammonium radical, they become the chemical formula after radical removal As for the chemical formula hydroxide, sulfate, radical, carbonic acid radical, nitrate radical and ammonium radical, they become the chemical formula after radical removal
- 20. Find the symbol of atom group: sulfate carbonate hydroxide ammonium nitrate Find the symbol of atomic group: sulfate carbonate hydroxide ammonium nitrate