[Soda Ash Knowledge] Daily Question (61) 2009.12.03
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Please hide the reply; no scoring will be given in principle if it is not hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Posts that have been edited are not rated. (The questions in this issue are taken from page 4 of \"Technical Worker Training Question Bank – Soda Ash Production Operators.\" An electronic version of this book is available for download in the soda ash information sharing area: http://bbs.hcbbs.com/thread-13140-1-2.html) Fill-in-the-blank questions: 1. The main chemical component of limestone is ( ), with a typical content of over ( ). In addition, it also contains ( ) and ( ). 2. The chemical equation for the decomposition of limestone is ( ). 3. The general requirement for the particle size of limestone after calcination is ( ) mm. 4. The molecular formula of carbon dioxide is ( ), and its relative molecular mass is ( ). 5. Solid carbon dioxide is commonly known as ( ).
1. CaCO3, 90%, MgCO3, silica 2. CaCO3 → ΔCaO + CO2 3. 50~100 4. CO2, 44 5. dry ice
1. Calcium carbonate, 90%, magnesium carbonate, silica 2. CaCO3---CaO+CO2 3.50～100 4. CO2, 44 5. Dry ice
1. Calcium carbonate, 90%, magnesium carbonate, silica 2. CaCO3 = CaO + CO2 3. 50–100 4. CO2, 44 5. Dry ice
1. Calcium carbonate, 90%, magnesium carbonate, silica. 2. Ca2CO3 → CaO + CO2↑ (reaction occurs under heating conditions). 3. 50–100. 4. CO2, 44. 5. Dry ice
1. Calcium carbonate 90%, magnesium carbonate, silica 2. CaCO3-(heating)-CaO+CO2| 3. 50~100 4. CO2 44 5. Dry ice
1. Calcium carbonate, 90%; silicon dioxide, iron oxide. 2. CaCO3 = CaO + CO2. 3. 15–50. 4. CO2: 44. 5. Dry ice
1. Calcium carbonate 90%, magnesium carbonate, silica. 2. CaCO3 —— Heating ——> CaO + CO2. 3. 50~100. 4. CO2: 44. 5. Dry ice
1. The main chemical component of limestone is (calcium carbonate), with a content generally exceeding (90%), and it also contains (magnesium carbonate) and (silicon dioxide). 2. The chemical equation for the decomposition of limestone is (CaCO3 → CaO + CO2↑). 3. The required particle size for limestone calcination is generally (50~100) mm. 4. The molecular formula of carbon dioxide is (CO2), and its relative molecular mass is (44). 5. Solid carbon dioxide is commonly known as dry ice.
1. The main chemical component of limestone is (calcium carbonate), with a content generally exceeding (90%), and it also contains (magnesium carbonate) and (silicon dioxide). 2. The chemical equation for the decomposition of limestone is (CaCO3 → CaO + CO2). 3. The required particle size for limestone calcination is generally (50–100) mm. 4. The molecular formula of carbon dioxide is (CO2), and its relative molecular mass is (44). 5. Solid carbon dioxide is commonly known as dry ice.
1. The main chemical component of limestone is (CaCO3), with a typical content of over (35%); in addition, it also contains (MgCO3) and (SiO2). 2. The chemical equation for the decomposition of limestone is (CaCO3 → CaO + CO2↑). 3. The required particle size for limestone calcination is generally (50–120) mm. 4. The molecular formula of carbon dioxide is (CO2), and its relative molecular mass is (44). 5. Solid carbon dioxide is commonly known as dry ice.