HSC Chemistry production of materials

Topics: Chlorine, Hydrogen, Alkene Pages: 10 (1084 words) Published: January 27, 2014

1
Ethene may be converted into poly(ethene). What type of reaction is this?

(A)Condensation

(B)Hydrolysis

(C)Oxidation/reduction

(D)Polymerisation

2001:1
1
2
You have carried out a first-hand investigation to compare the reactivity of an alkene with its corresponding alkane.

(a) State the name of the alkene.

2002:16(a)
1

(b) Outline a procedure to compare the reactivity of this alkene with its corresponding alkane.

2002:16(b)
2

(c) Describe the results obtained from this first-hand investigation and include relevant chemical equations.

2002:16(c)
3
3
Explain why alkanes and their corresponding alkenes have similar physical properties, but very different chemical properties.

2002:17
3
4
Which polymer is made by the polymerisation of methyl methacrylate?

CH3
H2C= C—COOCH3
methyl methacrylate

2003:11
1
5
The flowchart shows the production of polyethylene.

(b)Describe Process Y.

2003:17(b)
3
6
A sample of polyethylene was produced by Process Y. The following graph shows the distribution of molecular weights of polymer molecules in the sample.

(c)Why is a range of molecular weights observed?

2003:17(c)
1
7
Write a balanced chemical equation for the complete combustion of ethanol. 2003:22(a)
1

8
25.0 mL of 0.12 mol L−1 standard barium hydroxide solution was titrated with nitric acid. The results are recorded in the table.

Titration
Volume of nitric acid used
(mL)
1
20.4
2
18.1
3
18.2
4
18.1

(a) Write a balanced chemical equation for the reaction of barium hydroxide with nitric acid.

2003:23(a)
1
9
The structures of two commercially significant monomers are shown.

(a) Identify the common name of ONE of the monomers
2004:17(a)
1

(b) The uses of polymers are dependent on their properties.3

Discuss this statement with reference to a polymer made from one of the above monomers.

2004:17(b)
3

(c) Draw the structure of a polymer made from one of the above monomers.

2004:17(c)
1
10
During your practical work you performed a first-hand investigation to distinguish between an alkene and the corresponding alkane.

(a)Name the alkene used in your investigation.

2005:16(a)
1

(b)Identify a potential hazard in your investigation, and outline how you addressed this hazard.

2005:16(b)
2

(c)Outline the procedure you used for your first-hand investigation. 2005:16(c)
2

11
Write a balanced equation for the incomplete combustion of methane.

2005:23(b)
1
12
An antacid tablet is known to contain calcium carbonate (CaCO3). To determine the mass of calcium carbonate in the tablet, the following procedure was used.

• The tablet was crushed and then placed in a beaker.

• A pipette was used to add 25.0 mL of 0.600 mol L–1 hydrochloric acid to the crushed tablet in the beaker.

• Once the reaction between the calcium carbonate and hydrochloric acid had stopped, phenolphthalein indicator was added to the reaction mixture. • A teflon-coated burette was then used to add 0.100 mol L–1 sodium hydroxide to the beaker to neutralise the excess hydrochloric acid.

• The phenolphthalein changed from colourless to pink after 14.2 mL of the sodium hydroxide solution had been added.

(a)Write a balanced chemical equation for the reaction that occurred between the1 calcium carbonate in the tablet and the hydrochloric acid.

2005:24(a)
1
13
Which is the main industrial source of ethylene?

(A)Ethanol
(B)Glucose
(C)Petroleum
(D)Polyethylene

2006:1
1
14
A student was asked to perform a first-hand investigation to measure the difference in potential of various combinations of metals in an electrolyte solution. The student was provided with three metals: aluminium, zinc and silver; and three electrolyte solutions: aluminium nitrate, zinc nitrate and silver nitrate.

(a) Identify which combination of the metals...
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