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Magnesium ions react with chloride ions to form magnesium chloride - OCR Gateway - GCSE Chemistry: Combined Science - Question 7 - 2019 - Paper 9
Question 7
Magnesium ions react with chloride ions to form magnesium chloride. What is the correct ionic equation for this reaction? A Mg$^{2+}$ + Cl$^{-}$ → MgCl B Mg$^{2+... show full transcript
Worked Solution & Example Answer:Magnesium ions react with chloride ions to form magnesium chloride - OCR Gateway - GCSE Chemistry: Combined Science - Question 7 - 2019 - Paper 9
Step 1
Identify the Correct Ionic Equation
Answer
To determine the correct ionic equation for the formation of magnesium chloride from magnesium ions and chloride ions, we need to consider the valencies of the ions involved. Magnesium ions have a charge of +2 (Mg) and chloride ions have a charge of -1 (Cl).
Since two chloride ions are needed to balance the charge of one magnesium ion, the correct equation should show one magnesium ion reacting with two chloride ions.
The neutral compound formed is magnesium chloride (MgCl), which can be represented by the ionic equation:
ightarrow ext{MgCl}_{2}$$ Thus, the correct answer is: - **C** Mg$^{2+}$ + 2Cl$^{-}$ → MgCl$_{2}$