I am unsure exactly how to set up this calculation. From a graph that we got from getting different absorbances we took those points we got and got a equation for the best fit line. The equation was y = 760.8x + .02014 and the unknown absorbance equalled .254. We than wanted to determine the permanganate ion concentreation in the solution using the equation for the line. how exactly would you go about doing that?

Question

I am unsure exactly how to set up this calculation. From a graph that we got from getting different absorbances we took those points we got and got a equation for the best fit line. The equation was y = 760.8x + .02014 and the unknown absorbance equalled .254. We than wanted to determine the permanganate ion concentreation in the solution using the equation for the line. how exactly would you go about doing that?

Answer 1

I assume y is Absorbance and x is concn.

So plug 0.254 in for y (absorbance) and solve for x.
I never did this in school. We plotted the data and read the concn from the graph. You could do that, too.

Answer 2

I WANT THE PICTURE OFACID AND ALKALIS

Answer 3

To determine the permanganate ion concentration in the solution using the equation of the best-fit line, you need to substitute the known absorbance value into the equation and solve for the concentration (x).

Here's how you can do it step by step:

1. Start with the equation of the best-fit line:
y = 760.8x + 0.02014

2. Substitute the absorbance value (y) of 0.254 into the equation:
0.254 = 760.8x + 0.02014

3. Rearrange the equation to solve for x:
760.8x = 0.254 - 0.02014
760.8x = 0.23386

4. Divide both sides of the equation by 760.8 to isolate x:
x = 0.23386 / 760.8
x ≈ 0.000307

Therefore, the permanganate ion concentration in the solution is approximately 0.000307 units, as derived using the equation for the best-fit line and the given absorbance value.