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10.3 Using materials

10.3 Using materials

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Question 6

Polymers are used to make fabrics for outdoor hiking jackets.

Table 1 shows some properties of two polymers.

Table 1

PropertyPolymer APolymer B
Density in g/cm3\text{g/cm}^3g/cm30.81.2
Melting point in ∘C^\circ\text{C}∘C130220
Tensile strengthLowHigh
Water absorptionLowHigh
a.

A hiking jacket needs to be lightweight, durable (have high tensile strength), and water-resistant (have low water absorption). Based on Table 1, decide which polymer (Polymer A or Polymer B) is best for each of the following properties of a hiking jacket:

  1. Density (to make it lightweight)
  2. Tensile strength (to make it durable)
  3. Water absorption (to prevent wetting)
[3]
b.

A hiking jacket made from Polymer B has a mass of 1.8 kg1.8\text{ kg}1.8 kg. Calculate the mass of a jacket of the same dimension made from Polymer A.

Use the information in Table 1 and the equation:

mass of Polymer A jacket=density of Polymer Adensity of Polymer B×mass of Polymer B jacket \text{mass of Polymer A jacket} = \frac{\text{density of Polymer A}}{\text{density of Polymer B}} \times \text{mass of Polymer B jacket} mass of Polymer A jacket=density of Polymer Bdensity of Polymer A​×mass of Polymer B jacket
[2]
Markscheme

10.3 Using materials Questions

  1. GCSE
  2. /Chemistry
  3. /10.3 Using materials

18 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.

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