[Soda ash knowledge] Daily question (136) 2010.2.25
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Please hide the reply. If you do not hide it, you will not be graded in principle. Edited posts will not be graded. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2 %D8 The title of this issue is taken from the electronic version of the book "Technical Workers Job Training Question Bank-Soda Ash Production Operator": http://bbs.hcbbs.com/thread-13140-1-2.html 1. Short answer questions: 1. What is the chemical reaction in which refined brine absorbs ammonia and carbon dioxide?
The chemical reaction of refined brine absorbing ammonia and carbon dioxide is NH3+CO2+H20+NaCl=NH4Cl+NaHCO3↓ 2NaHCO3=Na2CO3+CO2↑+H2O (there should be a heating symbol on "="). To make soda ash (Na2CO3), use the small solubility of NaHCO3 in the solution, so NaHCO3 is made first. Then use the unstable decomposition of sodium bicarbonate to obtain soda ash. To make sodium bicarbonate, a large amount of sodium ions and bicarbonate ions are needed, so ammonia gas is introduced into saturated brine to form a saturated ammonia salt solution, and carbon dioxide is introduced into it. There are a large number of sodium ions, ammonium ions, chloride ions and bicarbonate ions in the solution. Among them, NaHCO3 has the smallest solubility, so it precipitates out. Furthermore, making ammonia is not a chemical reaction. Ammonia water is an aqueous solution of ammonia gas, which is produced by passing ammonia gas into water. Hydrated ammonia molecules are formed by combining ammonia molecules with hydrogen supplied by water through coordination bonds.
NH3+H2O(l)→NH4OH(aq)+34748J/mol CO2+H2O(l)→H2CO3(aq)+20152J/mol 2NH4OH(aq)+H2CO3(aq)→(NH4)2CO3(aq)+2H2O(l)+73836J/mol H2S(g)→H2S(aq) 2NH4OH(aq)+H2S(g)→(NH4)2S(aq)+2H2O(l)
NH3(g)+H2O(l)——NH4OH(aq)+34748J/mol CO2(g)+H2O(l)——H2CO3(aq)+20152J/mol 2NH4OH(aq)+H2CO3(aq)——(NH4)2CO3(aq)+2H2O(l)+73836J/mol H2S(g)——H2S(l) 2NH4OH(aq)+H2S(g)——(NH4)2S+2H2O(l)
The chemical reaction of refined brine absorbing ammonia and carbon dioxide is NH3+CO2+H20+NaCl=NH4Cl+NaHCO3↓ 2NaHCO3=Na2CO3+CO2↑+H2O (there should be a heating symbol on "="). To make soda ash (Na2CO3), use the small solubility of NaHCO3 in the solution, so NaHCO3 is made first. Then use the unstable decomposition of sodium bicarbonate to obtain soda ash. To make sodium bicarbonate, a large amount of sodium ions and bicarbonate ions are needed, so ammonia gas is introduced into saturated brine to form a saturated ammonia salt solution, and carbon dioxide is introduced into it. There are a large number of sodium ions, ammonium ions, chloride ions and bicarbonate ions in the solution. Among them, NaHCO3 has the smallest solubility, so it precipitates out. Furthermore, making ammonia is not a chemical reaction. Ammonia water is an aqueous solution of ammonia gas, which is produced by passing ammonia gas into water. Hydrated ammonia molecules are formed by combining ammonia molecules with hydrogen supplied by water through coordination bonds.
NH4+CO2→NH4HCO3 NaCl+NH4HCO3→NaHCO3+NH4Cl NaCl+NH3+CO2+H2O→NaHCO3+NaCL
answer: 1.NH3(g)+H2O(l)=NH4OH(aq)+34748J/mol 2.CO 2(g)+H2O=H2CO3(aq)+20152J/mol 3.NH4OH(aq)+H2CO3=(NH4)2CO3(aq)+2H2O(l)+73836J/mol 4.H2S(g)=H2S(aq) 5.2NH4OH(aq)+H2S(g)=(NH4)2S(aq)+2H2O(l) 1# 9067jxhuas
NH3(g)+H2O(l) → NH4OH(aq) CO2(g)+H2O(l)→H2CO3(aq) 2NH4OH(aq)+H2CO3(aq)→(NH4)2CO3(aq)+2H2O(l) H2S(g)→H2S(aq) 2NH4OH(aq)+H2S(g)→(NH4)2S(aq)+2H2O(l)
NH3(g)+H2O(L)__ NH4(OH)(aq)+34748J/mol CO2(g)+H2O(l)__ H2CO3(aq)+20152J/mol 2NH4(OH)(aq)+H2CO3(aq)__ _ (NH4)2CO3(aq)+2H2O(L)+73863J/mol H2S(g)__ _ H2S(ag) 2NH4(OH)(aq)+H2S(g)__ _ (NH4)2S(ag)+2H2O(L)
What is the chemical reaction of refined brine absorbing ammonia and carbon dioxide? NH3+H2O=NH40H CO2+H2O=H2CO3 2NH40H+ H2CO3=(NH4)2CO3+2H2O 2NH40H+H2S=(NH4)2S+2H2O
NH3(g)+H2O(l)→NH4OH(aq)+34748J/mol CO2(g)+H2O(l)→H2CO3(aq)+20152J/mol 2NH4OH(aq)+H2CO3(aq)→(NH4)2CO3(aq)+2H2O+73836J/mol H2S(g)→H2S(aq) 2NH4OH(aq)+H2S(g)→(NH4)2S(aq)+2H2O(l)