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3 Quantitative chemistry

3 Quantitative chemistry

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Question 46

Metal X\text{X}X is extracted from its chloride, XCl4\text{XCl}_4XCl4​, by reaction with magnesium.

The equation for the reaction is:

XCl4+2Mg→X+2MgCl2 \text{XCl}_4 + 2\text{Mg} \rightarrow \text{X} + 2\text{MgCl}_2 XCl4​+2Mg→X+2MgCl2​

The percentage atom economy for obtaining metal X\text{X}X by this method is 20.1%20.1\%20.1%.

Calculate the relative atomic mass (ArA_{\text{r}}Ar​) of metal X\text{X}X. Give your answer to 1 decimal place.

Relative atomic masses (ArA_{\text{r}}Ar​): Mg=24.3\text{Mg} = 24.3Mg=24.3, Cl=35.5\text{Cl} = 35.5Cl=35.5

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3 Quantitative chemistry Questions

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