Netherlands VWO 6 (eindexamenjaar) Chemistry
Chapters: 2
1. Industrial chemical processes
Industrial processes · Green chemistry · Energy conversions · Risk and safety · Sustainable production
- Industrial Chemistry: How a Chemical Plant Works – A chemical plant turns cheap raw materials into useful products. It prepares the raw materials, reacts them in a reactor under chosen conditions, separates the product and sends unused material back (recycling). Engineers balance speed, yield, cost, safety and the environment.
- Green Chemistry – Green chemistry means designing chemical products and processes that make less waste, use safer substances, save energy and use raw materials that can be renewed. Key tools are high atom economy, catalysts, safer solvents such as water, renewable feedstocks, and products that break down safely. A life cycle assessment checks the impact of a product from raw material to disposal.
- Conservation of Energy – Energy cannot be created or destroyed. It only changes from one form to another, or moves from one object to another. The total energy of a closed system stays the same. When there is no friction, mechanical energy (potential + kinetic) stays constant: mgh + ½mv² = constant. With friction, some mechanical energy turns into heat (thermal energy), but the total is still the same. Efficiency = useful energy out ÷ total energy in × 100%.
- Industrial Safety: Risk and Safety in Chemical Production – A hazard is something that can cause harm. Risk is how likely the harm is and how bad it would be. Chemical plants name their risks (fire, poison, pressure, heat), mark them with hazard symbols, and use many layers of protection such as good design, alarms, relief valves and training. Risk is judged as chance times effect and is kept low by adding layers.
- Sustainability – Sustainability means meeting our needs today without taking away the ability of future people to meet theirs. It rests on three pillars — environment, society and economy. A resource is used sustainably when we use it no faster than it renews. Today humanity uses about 1.7 Earths' worth of resources a year, and this use is very unequal. Stewardship, careful planning and spatial tools like GIS help us move towards sustainability.
2. Society, chemistry and technology
Chemistry of life · Environmental impact · Energy and industry · Environmental standards · Business processes
- Biochemistry: The Chemistry of Life – Plants build glucose by photosynthesis: 6 CO2 + 6 H2O + light gives C6H12O6 + 6 O2. Four families of big molecules (carbohydrates, proteins, fats, nucleic acids) are built from small units. Cells break nutrients down to release energy, with enzymes speeding every step. Proteins are made by reading DNA, copying it to mRNA and joining amino acids on a ribosome.
- Environmental Chemistry – Environmental chemistry studies the chemicals in air, water and soil, where they come from and what they do. Dry air is about 78% nitrogen, 21% oxygen, 0.9% argon and 0.04% carbon dioxide. Burning fuels adds pollutants such as SO₂, NOₓ, CO and particulates. SO₂ and NO₂ form acids in rain (pH below 5.6). We measure pollution with quantitative tests such as titration, compare the results with standards, and use laws and cleaner technology to reduce harm.
- Industrial Chemistry: How a Chemical Plant Works – A chemical plant turns cheap raw materials into useful products. It prepares the raw materials, reacts them in a reactor under chosen conditions, separates the product and sends unused material back (recycling). Engineers balance speed, yield, cost, safety and the environment.