Chemistry 9701/13 May June 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Atomic Structure and Bonding:
- Calculating the number of protons, neutrons, and electrons in ions.
- Understanding molecular shapes, such as in SiCl₄ and PCl₃, and recognizing bond types.

2. Chemical Reactions and Stoichiometry:
- Identifying reactions like the combustion of alkenes and understanding the stoichiometry behind reactions such as Haber Process and the decomposition of hydrogen peroxide.

3. Thermodynamics and Enthalpy:
- Calculating enthalpy changes in reactions, such as those involving iron oxide or the formation of sulfur oxides.
- Understanding the effect of temperature on equilibrium and reaction rates.

4. Organic Chemistry:
- Understanding various organic reactions, including nucleophilic substitution, electrophilic addition, and ester formation.
- Identifying products of reactions involving compounds like propanal, butanone, and ethyl propanoate.

5. Gas Laws and Ideal Gas Behavior:
- Applying the ideal gas law to solve for temperature, pressure, and volume in different scenarios.

6. Periodic Trends and Group Properties:
- Understanding trends in properties like melting points, ionization energies, and reactivity across groups in the periodic table.
- Identifying the properties of elements like calcium, magnesium, silicon, and sulfur.

7. Environmental Chemistry:
- Identifying the effects of gases like sulfur dioxide on the environment and understanding its role in acid rain.