How do i find the concentration from the calibration curve? This is the example

Question

How do i find the concentration from the calibration curve?

This is the example used in our standard addition lab handout, but I'm having a hard time applying it to my own data.

In the experiment, we are finding the content of iron in tablets, a standard was prepared, along with samples from the iron tablet powder.

How do i calculate [M] as seen in cell D18? what values did they use to get 0.00389?

How do i find the concentration from the calibration curve? This is the example used in our standard addition lab handout, but I'm having a hard time applying it to my own data. In the experiment, we are finding the content of iron in tablets, a standard was prepared, along with samples from the iron tablet powder. How do i calculate [M] as seen in cell D18? what values did they use to get 0.00389?

Explanation / Answer

U can find the concentration from the claibration curve by using the formula of y=mx+c .

y = absorbance value obtained from the excel sheet

m = value obtained from the calibration curve

x = unknown concentration

c = value obtained from the calibration curve

so as we know, the value y, m &c we can calculate the value of x, which is the unknown concentration.

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