Question

The reaction of Cr₂O₃ with silicon metal at high temperatures will make chromium metal.

2Cr₂O₃​(s) + 3Si(s) 4Cr(l) + 3SiO₂(s)

The reaction is begun with 188.00 g of Si and 110.00 g of Cr₂O₃.

A) What is the limiting reactant?

B) How many grams of the excess reactant are left after the reaction is complete?

Answer 1

Solution: 3 Sr0( 3 Sr(s) 2 Ch202 5) 4 Cr) oight giein moles 116 o.72 188 6.77 28 I52 6.77 2.25 3 0.72 0.30 Reasnt small the liniting heagut hre C 4 C)t 3 S, (S B) 3 Si (s) 2 Chy35) = 3 Tmales tS 2 meles of C°3 xo.72meles ef S will be o.72 meles ot C, used 1.08 moles be used uh Sil e 108x28-30.24 S uilf be ued up. Amount a S 5.769 lihtoe-88-t Scanned with CS CamScanner