Question

Will give medals if you can explain:
Approximately how long do you think it would take to decrease the concentration of indigo carmine from 20mg/L to 10mg/L using 1.0 grams of iron?
We just did a reactions barrier lab with indigo carmine and iron.

Answer 1

the concentration is being cut \(in \space half\). Do you know about the \(order\) of the reaction you've studied and its \(half-life\)?

Answer 2

@jfraser , I don't believe we've covered that, nor has our teacher or lab manual mentioned that

Answer 3

What other information were you given, or obtained from the lab?

Answer 4

you've got data, right? come kind of concentration or absorbance vs time graph, maybe?

Answer 5

@jfraser yes, we had to plot our data, we solved for the concentration of indigo carmine, given the absorbance. i used the linear regression to solve for the concentration

Answer 6

ok, do you have graphs of multiple trials, or perhaps one trial of concentration v. time?

Answer 7

yes, one second

Answer 8

for my data, i plotted all the points with their absorbance and times and my linear regression equation came out to be y=0.0189x-0.035. i was able to solve for the concentrations by putting in my absorbance values for y, and solving for x (concentration)

Answer 9

@.sam. @pooja195

Answer 10

@tkhunny

Answer 11

@Nnesha

Answer 12

@jfraser

Answer 13

@mathstudent55

Answer 14

that's great, you have abs. v concentration data, but do you have concentration vs. \(time\)?