Chemistry — Changes to Materials
Chemistry — Changes to Materials — Cambridge Lower Secondary Science 0893, Stage 9. Equations and displacement reactions; Salt preparation, rates and conservation of mass.
Equations and displacement reactionsSign up
Use word equations and symbol equations to describe reactions (balancing symbol equations is not required). · Identify examples of displacement reactions and predict products (limited to reactions involving calcium, magnesium, zinc, iron, copper, gold and silver salts).
Salt preparation, rates and conservation of massSign up
Describe how to prepare some common salts by the reactions of metals with acids, and metal carbonates with acids, and purify them, using filtration, evaporation and crystallisation. · Describe the effects of concentration, surface area and temperature on the rate of reaction, and explain them using the particle model. · Understand that in chemical reactions mass and energy are conserved.