
Data test questions come up again in the 50% external exam so make sure you try to get 100% on this one.
Most common data sets for Y12 will be ones on titration curves, electrode potentials and equilibrium curves. 
How to Describe Graphs

Important skills for DT and SE: How to describe a graph.

QUESTION TEST BANK
Below is an attempt to cover all the possible types of data sets you might encounter and their possible questions.
Data Set Type 1a: Equilibrium Curves
Possible Questions:


Equilibrium Curve Question:

Answers:

1. Write the balanced equation for the above reaction. A, B and C are all
gasses and dH is negative.
2. State and explain what may have happened from t2 to t3.
3. Draw in lines in the graph from t3 to t4 if the volume doubled.
4. Write the Kc expression and determine the Kc value at t1.
5. Determine the concentration of A if [B] and [C] are both 0.5M.
gasses and dH is negative.
2. State and explain what may have happened from t2 to t3.
3. Draw in lines in the graph from t3 to t4 if the volume doubled.
4. Write the Kc expression and determine the Kc value at t1.
5. Determine the concentration of A if [B] and [C] are both 0.5M.
Data Set Type 1b: Equilibrium Tables
Possible Questions:


Data Set Type 2a: Titration Curves
Possible Questions:


Data Set Type 2b: Titration Tables
Possible Questions:


Titration Table Question:
A solution of Fe2+ 0.9M solution was tested for accuracy by titration using a standardised 0.2M KMnO4 solution. 10mL aliquots were used. The half reactions for the reaction are given below: 1. Show the balanced chemical reaction.
2. Determine the average titre with uncertainty. 3. Calculate the absolute uncertainty of the mean for the data. 4. Determine the concentration of the Fe2+ solution. 5. Determine the percent error. 
Answers:

Data Set Type 3a: Electrochemical Cell Tables
Possible Questions:


Data Set Type 3b: Electrochemical Cell Diagrams
Possible Questions: (redox tables from data booklet needed in most instances)


Electrochemical Cell Diagram Question:
The following set up is for the electrolysis of concentrated NaCl solution.
1. Fully label the above diagram. Show oxidation numbers on the half reactions to indicate which is oxidised and which is reduced.
2. Determine the products of electrolysis with the full balanced equation and EMF. 3. If the Ag electrode changed in mass by 0.1g, what volume of gas was released? 
Answers:

Data Test Practice Test
The QCAA markscheme has a major error in item 3  a corrected version is below. It's OK you are all going on a bell curve anyway!
snr_chemistry_19_ia1_smple_ass_inst_dt.pdf 
QCAA markscheme:
snr_chemistry_19_ia1_smple_m_scheme.pdf 