Question

OBSERVATIONS (PERFORM) 2. Organizing Data For each set of reactant masses used in the reaction, record the mass silicon (Si) product obtained in the table below Silicon Product Obtained SiO2 (g) 380 C (g) Si (g) 560 640 680 520 820 380 820

Answer 1

SiO₂ + C $\rightarrow$ Si + CO

Moles of Si formed is the same as moles of SiO₂ consumed. Molar mass of SiO₂ = 60.084g/mol

Moles of carbon is not calculated because their value comes out to be greater than SiO₂. Hence SiO₂ is limiting reagent and will determine the amount of products formed.

Moles of SiO₂

set 1: 380/60.084 = 6.3245mol

Set 2: 560/60.084 = 9.3203mol

Set 3 :680/60.084= 11.3175mol

Set 4 : 820/60.084 = 13.6476mol

Mass of Si produced = number of moles × atomic mass

Set 1: 6.3245×46.7435= 295.63g

Set2: 9.3203×46.7435= 435.66g

Set 3: 11.3175×46.7435= 529.02g

Set 4: 13.6476×46.7435= 637.94g

Answer 2

Si (g) -->  | 178 | 262 | 318 | 383 |