A first order reaction has a rate constant 1.15×10 - 3s - 11.15×10 - 3s - 1 . How long will 5g5g this reactant takes to reduce to 3g?
Initial amount = [R]0 = 5g[R]0 = 5g Final concentration = [R] = 3g[R] = 3g Rate constant = 1.15×10 - 3s - 11.15×10 - 3s - 1 For a first order reaction t=2.303klog[R]0Rt=2.303klog[R]0R =2.3031.15×10−3log53=2.3031.15×10−3log53 =2.3031.15×10−3×0.2219=2.3031.15×10−3×0.2219 = 444.38 s444.38 s or 444 s
