127. In the interferometric determination of the concentration of hydrochloric acid solutions, the following data were obtained:
Acid concentration, mol/dm3 0.205 0.400 0.605 0.805 1.05
Compensator readings 1.54 3.01 4.54 6.10 7.62

Build a calibration graph and derive an equation for the dependence of the concentration of hydrochloric acid on the readings of the compensator scale. Determine the titer of a hydrochloric acid solution by NaOH, if for this solution the reading on the scale is:
task number 127
Reading on a scale of 4.48

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