Ion Equation of HCO3-+OH-

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• 1. 2013 Liaoning College Entrance Examination General Question 10 Option A 2Fe+6H*=2Fe3 3H2 Why is it wrong? Why is D right?
• 2. A solid powder may be one or more of sodium hydroxide, calcium hydroxide, sodium carbonate, and calcium carbonate... A solid powder may be composed of one or more of sodium hydroxide, calcium hydroxide, sodium carbonate and calcium carbonate. The following experiments are conducted:1 take a small amount of solid and add sufficient water, stir, and there is insoluble substance;2 filter, add hydrochloric acid to the filtrate, and there is bubble. In the following judgment on the composition of solid powder, the incorrect is () A. There must be sodium carbonate B. Possible sodium hydroxide C. Must have calcium carbonate D. Possible calcium hydroxide
• 3. How to Distinguish Calcium Hydroxide and Sodium Hydroxide
• 4. How do identify sodium hydroxide solution and calcium hydroxide solution?
• 5. How to Balance NaCO3+HCl -- NaCl+CO2+H2O
• 6. How is Fe (OH)2+O2+H2O-Fe (OH)3 balanced? Is it observation? How to balance Fe (OH)2+O 2+H 2O-Fe (OH)3? Is it observation?
• 7. Is Fe (OH)2+O 2=Fe 2O 3+H 2O?
• 8. Al (OH)3+OH-=Al3++H2O+O2 Is this equation right? Why do some places see the generation of ALO2-+H2O?
• 9. Who can help me balance the following chemical equations: FeSO4+HNO3→Fe2(SO4)3+Fe (NO3)3+N2O+H2O; H2O2+H2CrO4→H2O+O2+Cr (OH)3
• 10. Equation for NA2O2 and H2O Reaction
• 11. Inspection of ethanol combustion products CO CO2 H2O 1 Concentrated sulfuric acid 2 A clarified lime water B sodium hydroxide solution C clarified lime water 3 Hot copper oxide powder 4 Anhydrous copper sulfate How to sort? What is the function of ABC bottle solution? What does 3 do? Note: ABC devices in 2 are connected in one piece. Verify ethanol combustion product CO CO2 H2O 1 Concentrated sulfuric acid 2 A clarified lime water B sodium hydroxide solution C clarified lime water 3 Hot copper oxide powder 4 Anhydrous copper sulfate How to sort? What is the function of ABC bottle solution? What does 3 do? Note: ABC devices in 2 are connected in one piece.
• 12. How to calculate the valence of sulfate ion
• 13. What is the meaning of a chemical formula of a molecule (e.g. CO2) What is the meaning of a chemical formula of a molecule (e.g. Fe) The meaning or writing of the following symbols H__,__.3N2__,__.5Cu__,__. The valence of calcium in calcium hydroxide ____. 2 Oxygen atoms.2 oxygen molecules.2 oxygen ions.
• 14. CO2+H2O+2NACLO=NA2CO3+2HCLO CO2+H2O+NACLO=NAHCO3+HCLO CO2+H2O+C6H5ONA=NAHCO3+C6H5OH CO2+H2O+2C6H5ONA=NA2CO3+2C6H5OH can not react? All of you, look, there are four responses.
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• 16. NH4++OH-=NH3+H2O according to this ion equation to write the chemical equation The condition is heat! NH4++OH-=NH3+H2O according to this ion equation The condition is heat!
• 17. Carbon dioxide is introduced into clear lime water, which becomes turbid (chemical equation)
• 18. How to Write the Chemical Equation of Clarifying Lime Water through Carbon Dioxide How to Write the Chemical Equation of Clarifying Lime Water with Carbon Dioxide
• 19. The ion equation CO3(2-)+2H (+)=CO2↑+H2O can not be used to express A. NaHCO3+HCL=NaCL+CO2↑+H2O. B.K2CO3+H2SO4=Na2SO4+CO2 H2O Why is the answer A? B item is wrong or The ion equation CO3(2-)+2H (+)=CO2↑+H2O can not be used to express A. NaHCO3+HCL=NaCL+CO2↑+H2O. B.K2CO3+H2SO4=Na2SO4+CO2 H2O Why is the answer A? Is item B wrong or
• 20. Chemical Equation for CO2 to Clear Lime Water