Written Paper
Section I
Question 5 - 2001 HSC
Substance that contributes most to the pH of unpolluted rainwater
Written Paper
Section I
Question 6 - 2002 HSC
Identify an amphiprotic chemical using its formula
Written Paper
Section I
Question 6 - 2001 HSC
Using a graph of colour ranges of three acid-base indicators and the colour of a solution in each indicator, identify the pH range of the solution.
Written Paper
Section I
Question 7 - 2002 HSC
Reason for Brönsted's-Lowry's definition of acids being a significant improvement over earlier definitions
Written Paper
Section I
Question 7 - 2001 HSC
Identification of common household acidic substance
Written Paper
Section I
Question 8 - 2002 HSC
Substance used to rinse each piece of glassware used in a titration
Written Paper
Section I
Question 8 - 2001 HSC
Given the equation for the burning of sulphur, calculate the volume of sulphur dioxide produced at 25° and 101.3kPa. (Note that molar volume is now reported using a pressure of 100kPa.)
Written Paper
Section I
Question 9 - 2002 HSC
Four sequenced steps required for making an ester in a flask
Written Paper
Section I
Question 9 - 2001 HSC
Prediction that can be made using Le Chatelier's principle
Written Paper
Section I
Question 10 - 2002 HSC
Identify an equation representing esterification
Written Paper
Section I
Question 10 - 2001 HSC
Given two equations describing the reactions in the formation of acid rain, identify what would occur if solid sodium sulfate were added to a sample of acid rain.
Written Paper
Section I
Question 19-21 - 2001 HSC
19. Name and evaluate the effect of a type of galvanic cell in terms of chemistry and impact on society. 20(a) State one way in which pH can be measured. (b) Explain why solutions of equal concentrations of hydrochloric acid and citric acid have different pH values. 21(a) Name the type of reaction when barium hydroxide and sulfuric acid react. (b) Explain the changes shown in a graph measuring the conductivity of a sample of barium hydroxide when titrated with sulfuric acid. (Note that part (b) is not in the current course.)
Written Paper
Section I
Question 20 - 2002 HSC
(a) Identify a common household base. (b) Assess the validity of a conclusion that all colourless solutions tested in an experiment were basic, using a table of results and a table of indicator colours at various pH levels.
Written Paper
Section I
Question 21 - 2010 HSC
Explain why solutions of hydrochloric acid and ethanoic acid with different concentrations have the same pH.
Written Paper
Section I
Question 21 - 2002 HSC
Evaluate the impact of industrial sources of sulfur dioxide and nitrogen oxides on the environment, making use of appropriate chemical equations.
Written Paper
Section I
Question 22 - 2010 HSC
(a) Name a common use for the class of compounds to which methyl propanoate belongs. (b) Explain why reflux is necessary in the production of methyl propanoate. (c) Name and draw the structural formulae of the two reactants used to prepare methyl propanoate.
Written Paper
Section I
Question 22 - 2002 HSC
(a) Calculate the pH of a hydrochloric acid solution, given equal concentrations of hydrochloric acid, sulfuric acid and acetic acid and a known pH for the acetic acid. (b) Compare the pH values of the sulfuric acid and hydrochloric acid solutions. (c) Explain why the acetic acid solution has a higher pH than the hydrochloric acid solution.
Written Paper
Section I
Question 22-24 - 2001 HSC
22. Justify the procedure used to prepare an ester in a school laboratory and include relevant chemical equations. 23(a) State Brönsted-Lowry's definition of a base. (b) Calculate the molar mass of a base in a household cleaning agent. 24(a) State a use of ammonia other than as a cleaning agent. (b) State the effect on the yield of the Haber Process when ammonia is liquefied. (c) Explain why it is essential to monitor temperature and pressure inside the reaction vessel when producing ammonia.
Written Paper
Section I
Question 23 - 2002 HSC
(a) Identify the gas released when the cap is removed from a bottle of soft drink. (b) Given a graph showing how the mass of cap, bottle and contents changes over time, calculate the volume of gas released at 25°C and 101.3kPa (Note: since 2003 HSC, molar volume is expressed at 100kPa).
Written Paper
Section I
Question 25-27 - 2001 HSC
25. Explain the need for monitoring the products of a chemical reaction such as combustion. 26(a) Draw a graph using a fixed scale and data about lead concentrations. (b) Use the graph to interpret data. (c) State an hypothesis to account for variation in lead concentration observed. 27. Use a graph showing how ozone concentration changes with altitude to compare the environmental effects of the presence of ozone in the upper and lower atmosphere.
Written Paper
Section I
Question 26 - 2010 HSC
Calculate the volume of gas produced at 25°C and 100kPa when 10g of zinc is placed in 0.50 L of 0.2mol L-1 nitric acid.
Written Paper
Section I
Question 28 - 2010 HSC
Describe identified steps in a titration flowchart to determine the concentration of an unknown hydrochloric acid solution. Determine the concentration of hydrochloric acid used, given volume and concentration of a sodium carbonate standard solution.
