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theoretically your best fit line should go through the origin (0,0). i.e. if the concentration of the material is 0 mol/l then its absorbance should also be zero. however, this may not be the case. list one reason that your best fit line may have an intercept not equal to zero and explain what you could do to correct for this error

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Since there is no light absorption, the trendline must cross at (0, 0). The substance should have zero absorbance if its concentration is 0 mol/l.

Concentration is the ratio of a constituent's abundance to the mixture's overall volume. The concentration can refer to any form of chemical mixture, but is most usually used to describe the solutes and solvents in solutions. There are several different types of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration[1]. In common language, concentration is described qualitatively by the use of adjectives like "dilute" for solutions with a relatively low concentration and "concentrated" for solutions with a relatively high concentration. The molar (amount) concentration has variations, such as normal concentration and osmotic concentration. More solute (such as alcohol) or less solvent must be added to a solution to concentrate it (for example, water).

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