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63.5 g of copper reacts to make 134.5 g of copper chloride, CuCl₂ - OCR Gateway - GCSE Chemistry - Question 10 - 2023 - Paper 1
Question 10
63.5 g of copper reacts to make 134.5 g of copper chloride, CuCl₂. Cu + Cl₂ → CuCl₂ How much copper chloride will be made from 0.635 g of copper? A 0.01345 g B 0.... show full transcript
Worked Solution & Example Answer:63.5 g of copper reacts to make 134.5 g of copper chloride, CuCl₂ - OCR Gateway - GCSE Chemistry - Question 10 - 2023 - Paper 1
Step 1
How much copper chloride will be made from 0.635 g of copper?
Answer
To solve for the amount of copper chloride produced from 0.635 g of copper, we can use stoichiometry based on the reaction:
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Molar Mass Calculation:
- Copper (Cu) has a molar mass of approximately 63.5 g/mol.
- Copper(II) chloride (CuCl₂) has a molar mass of approximately 134.5 g/mol.
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Moles of Copper: Calculate the moles of copper from 0.635 g:
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Using Stoichiometry: From the balanced equation, 1 mole of Cu produces 1 mole of CuCl₂. Therefore, the moles of CuCl₂ produced will also be approximately 0.01 mol.
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Mass of Copper Chloride: Convert the moles of CuCl₂ back to grams:
Thus, out of the given options, the correct answer is C) 1.345 g.