Answer to Question #158723 in General Chemistry for sd

Question

Data information: Absorbance and time when [MG+] =11*10^-6 M and [OH-]=0.10M

Directions--> Find the concentration:

Given( Linear regression equation) y=-0.194x+1.07

Given absorbance values:

Trial 1: 0.420 (Find concentration M)

Trial 2: 0.322 (Find concentration M)

Trial 3: 0.244 (Find concentration M)

Trial 4: 0.184 (Find concentration M)

Trial 5: 0.139 (Find concentration M)

Trial 6: 0.104 (Find concentration M)

Trial: 7: 0.079 (Find concentration M)

Answer 1

y = - 0.194x + 1.07

Trial 1: 0.420 (Find concentration M)

Now for , x =0.420

y = (- 0.197×0.420 ) + 1.07

y = 0.98726 M

Trial 2: 0.322 (Find concentration M)

Now for x = 0.322

y = (-0.197×0.322) + 1.07

y = 1.00656M

Trial 3: 0.244 (Find concentration M)

Now for x = 0.244

y = (-0.197×0.244) + 1.07

y = 1.021932M

Trial 4: 0.184 (Find concentration M)

Now for x = 0.184

y = (-0.197×0.184)+1.07

y = 1.033752M

Trial 5: 0.139 (Find concentration M)

Now for x = 0.139

y = (-0.197×0.139)+1.07

y = 1.042617M

Trial 6: 0.104 (Find concentration M)

Now for x = 0.104

y = (-0.197×0.104)+1.07

y = 1.049512M

Trial: 7: 0.079 (Find concentration M)

Now for x = 0.079

y = (-0.197×0.079)+1.07

y = 1.054437M