designs and evaluates investigations in order to obtain primary and secondary data and information CH11/12-2

› conducts investigations to collect valid and reliable primary and secondary data and information CH11/12-3

› selects and processes appropriate qualitative and quantitative data and information using a range of appropriate media CH11/12-4

explores the many different types of chemical reactions, in particular the reactivity of metals, and the factors that affect the rate of chemical reactions CH11-10

Chemical ReactionS

IQ1: What are the products of a chemical reaction?

Students:

● investigate a variety of reactions to identify possible indicators of a chemical change

● use modelling to demonstrate

– the rearrangement of atoms to form new substances

– the conservation of atoms in a chemical reaction (ACSCH042, ACSCH080)

● conduct investigations to predict and identify the products of a range of reactions, for example:

– synthesis

– decomposition

– combustion

– precipitation

– acid/base reactions

– acid/carbonate reactions (ACSCH042, ACSCH080)

● investigate the chemical processes that occur when Aboriginal and Torres Strait Islander Peoples detoxify poisonous food items

● construct balanced equations to represent chemical reactions

Predicting Reactions of Metals

IQ2: How is the reactivity of various metals predicted?

Students:

● conduct practical investigations to compare the reactivity of a variety of metals in:

– water

– dilute acid (ACSCH032, ACSCH037)

– oxygen

– other metal ions in solution

● construct a metal activity series using the data obtained from practical investigations and compare this series with that obtained from standard secondary-sourced information (ACSCH103)

● analyse patterns in metal activity on the periodic table and explain why they correlate with, for example:

– ionisation energy (ACSCH045)

– atomic radius (ACSCH007)

– electronegativity (ACSCH057)

● apply the definitions of oxidation and reduction in terms of electron transfer and oxidation numbers to a range of reduction and oxidation (redox) reactions

● conduct investigations to measure and compare the reduction potential of galvanic half-cells

● construct relevant half-equations and balanced overall equations to represent a range of redox reactions

● predict the reaction of metals in solutions using the table of standard reduction potentials

● predict the spontaneity of redox reactions using the value of cell potentials (ACSCH079, ACSCH080)

Rates of Reactions

IQ3: What affects the rate of a chemical reaction?

Students:

● conduct a practical investigation, using appropriate tools (including digital technologies), to collect data, analyse and report on how the rate of a chemical reaction can be affected by a range of factors, including but not limited to:

– temperature

– surface area of reactant(s)

– concentration of reactant(s)

– catalysts (ACSCH042)

● investigate the role of activation energy, collisions and molecular orientation in collision theory

● explain a change in reaction rate using collision theory (ACSCH003, ACSCH046)