Question

chloroform (CHCl3) is a known aesthetic. it is also used to produce the refrigerant carbon tetrachloride (CCl4) according to the reaction: CHCl3 (g) + Cl2 (g) CCl4 (g) + HCl (g)

write the law expression for the reaction. calculate the rate constant

Answer 1

The reaction between chloroform, CHCl3​(g) and chlorine Cl2​(g) to form CCl4​(g) and HCl(g) is believed to occur by this series of steps:Step 1: Cl₂​(g)⟶Cl(g)+Cl(g)Step 2: CHCl₃(g)+Cl(g)⟶CCl₃(g) +HCl(g)Step 3: CCl₃​(g)+Cl(g)⟶CCl₃​(g)If this reaction is first order in CHCl3​ and half order in Cl2​Given rate=k[CHCl₃][Cl₂]^1/2This rate can be obtained if step 2 is slower than step 1 and that step 1