Question

BRAINLIEST!! HELP!! The pure silicon used in silicon computer chips can be generated by the reaction of silicon tetrachloride with magnesium metal which generates solid silicon and solid magnesium chloride. You react 1.0 moles of silicon tetrachloride with 5.0 moles of magnesium metal and your target product is silicon.
Equation: ?
Limiting reactant; ?
Moles of target product produced: ?
Moles of excess reagent remaining: ?

Answer 1

Reaction

SiCl₄+ 2Mg ⇒ Si + 2MgCl₂

to find limiting reagents: divide the number of moles by their coefficients

SiCl₄ = 1 mole : 1 (coefficient) = 1

Mg = 5 mole : 2 (coefficient) = 2.5

SiCl₄ as a limiting reactant (smaller), and Mg as an excess

then all the compounds involved in the reaction are based on moles of SiCl₄

Si produced =

$\tt \dfrac{coefficient~Si}{coefficient~SiCl_4}\times mole~Si=\dfrac{1}{1}\times 1=1$

Reacted Mg (excess) = 2/1 x 1 = 2 mole

mole Mg remaining = 5 - 2 = 3 mole