based on this table

Group Data for pH Experiment Absorbance and Time are recorded in lab. YOU must calculate the Concentration and the RATE. How? First you must use the data above to create a standard curve. Then you will plug in the absorbances given below, one by one, into the equation for x (if you made it correctly). The answer is concentration and you write it into the column. Once you have all the Concentrations, divide each by the Total Time for that pH (in seconds). So you have to convert minutes into seconds. PH Absorbance Total Time Concentration (mM) Rate (mM/sec) 0.9658x0.27-2.361 15x60=900 6=0.260766-2.361 -2.1008/900= 4.0 0.27 15 min 6=-2.1008 mM -0.00233 mM/s ec 0.9658x0.38-2.361 15x60=900 6=0.367004-2.361 -1.9946/900= 4.5 0.38 15 min 6=-1.9946 mM -0.00222 mM/s ec 0.9658x0.87-2.361 15x60=900 6=0.840246-2.361 -1.5214/900= 5.0 0.87 15 min 6=-1.5214 mM -0.00169 mM/s ec 0.9658x1.25-2.361 12x60=720+31 6=1.20725-2.3616 =751 5.5 1.25 12m 31s =-1.1544mM -1.1544/751= -0.00154 0.9658x1.25-2.361 10x60=600+11 6=1.20725-2.3616 =611 6.0 1.25 10m 11s = -1.1544mM -1.1544/611=