9701_s14_qp_11
A paper of Chemistry, 9701
Questions:
40
Year:
2014
Paper:
1
Variant:
1
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2
Use of the Data Booklet is relevant to this question. Iodine is a black, shiny, non-metallic solid and a member of Group VII. It sublimes easily on heating to give a purple vapour. A sample of iodine vapour of mass 6.35 g has a volume of 1.247 dm3 when maintained at constant temperature and a pressure of 1.00 × 105 Pa. If iodine vapour acts as an ideal gas, what is the temperature of the iodine vapour?
4. States of matter  →  4.1. The gaseous state: ideal and real gases and \( pV = nRT \)
11. Group 17  →  11.1. Physical properties of the Group 17 elements
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8
When making sparkler fireworks, a mixture of barium nitrate powder with aluminium powder, water and glue is coated onto wires and allowed to dry. At this stage, the following exothermic reaction may occur. 16Al + 3Ba(NO3)2 + 36H2O → 3Ba(OH)2 + 16Al (OH)3 + 6NH3 Which conditions would be best to reduce the rate of this reaction during the drying process, and would also keep the aluminium and barium nitrate unchanged?
10. Group 2  →  10.1. Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds
8. Reaction kinetics  →  8.2. Effect of temperature on reaction rates and the concept of activation energy
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13
When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture is filtered and carbon dioxide is bubbled through the filtrate, producing a second white precipitate, Z. What are Y and Z?
7. Equilibria  →  7.2. Brønsted–Lowry theory of acids and bases
16. Hydroxy compounds  →  16.1. Alcohols
10. Group 2  →  10.1. Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds
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18
Use of the Data Booklet is relevant to this question. A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted it with a large volume of hydrogen gas, in order to produce ammonia. Only 15.0% of the nitrogen gas reacted to produce ammonia. What mass of ammonia was formed?
12. Nitrogen and sulfur  →  12.1. Nitrogen and sulfur
2. Atoms, molecules and stoichiometry  →  2.4. Reacting masses and volumes (of solutions and gases)
4. States of matter  →  4.1. The gaseous state: ideal and real gases and \( pV = nRT \)
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28
Compound X has the molecular formula C4H10O2. X has an unbranched carbon chain and contains two OH groups. On reaction with an excess of hot, acidified, aqueous manganate(ions, X is converted into a compound of molecular formula C4H6O4. To which two carbon atoms in the chain of X are the two OH groups attached?
13. An introduction to AS Level organic chemistry  →  13.1. Formulas, functional groups and the naming of organic compounds
2. Atoms, molecules and stoichiometry  →  2.3. Formulas
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