Mass of Chlorine gas : 4.544 g
Further explanation
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction Chlorine gas with Sodium iodide :
Cl₂(g)+2NaI(s)⇒2NaCl(s)+I₂(s)
Sodium chloride-NaCl produced = 7.5 g
mass NaCl(MW=58.5 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{7.5}{58.5}\\\\mol=0.128[/tex]
mol Cl₂ based on mol NaCl
From the equation, mol ratio Cl₂ : NaCl = 1 : 2, so mol Cl₂ :
[tex]\tt \dfrac{1}{2}\times 0.128=0.064[/tex]
mass Cl₂ (MW=71 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=0.064\times 71\\\\mass=4.544~g[/tex]
