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AQA GCSE · Question 04.4 · Bonding structure and the properties of matter
What is the melting point of pure tin? Use Figure 5.
What is the melting point of pure tin? Use Figure 5.
How to approach this question
1. Locate "pure tin" on the x-axis. Pure tin corresponds to 100% tin.\n2. Find 100 on the x-axis.\n3. Follow the vertical line up from 100 until you reach the data line.\n4. From that point on the data line, follow the horizontal line across to the y-axis.\n5. Read the value on the y-axis. Each small square on the y-axis represents 2°C.
Full Answer
232 °C
To find the melting point of pure tin, we need to look at the point on the graph where the percentage by mass of tin is 100%. \n1. Find 100 on the x-axis.\n2. Go up to the line graph.\n3. Read across to the y-axis. The value is one small square above 230. Since each major grid line is 20°C and there are 10 small squares, each small square is 2°C. Therefore, the melting point is 232°C.
Common mistakes
✗ Reading the value for 0% tin (pure lead) instead of 100% tin.\n✗ Misreading the scale on the y-axis.
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