Question

Value: 4

The equation of a line for Data Set 4 is y = 0.14*x + -0.0398 where y is the absorbance

values and x is the concentration in mg/mL. This was created using data from known

concentrations and absorbances. Now we can use this equation of a line to determine

the concentration of an unknown solution.

Determine the concentration of an unknown solution that has an absorbance of 0.622.

Concentration =

mg/mL. Use two sig figs in your final answer

= 1/2

Next >

Answer 1

x = 4.73

Step-by-step explanation:

Given

y = 0.14x - 0.0398

Required

Find x when y = 0.622

To do this, we first substitute 0.622 for x.

y = 0.14x - 0.0398 gives

0.622 = 0.14x - 0.0398

Solve for 0.14x

0.14x = 0.622 + 0.0398

0.14x = 0.6618

Solve for x

x = 0.6618/0.14

x = 4.7271428571

x = 4.73 approximated