The relationship between phenolphthalein alkalinity and pH
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NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH 0.019 0.036 9.556 0.062 9.792 0.088 9.945 0.011 9.040 0.037 9.568 0.063 9.80 0.089 9.950 0.012 9.080 0.038 9.580 0.064 9.806 0.099 9.953 0.013 9.104 0.039 9.590 0.065 9.813 0.091 9.958 0.014 9.145 0.049 9.60 0.066 9.818 0.092 9.964 0.015 9.175 0.041 9.614 0.067 9.826 0.093 9.967 0.016 9.203 0.042 9.622 0.068 9.832 0.094 9.973 0.017 9.230 0.043 9.634 0.069 9.838 0.095 9.976 0.018 9.255 0.044 9.644 0.079 9.845 0.096 9.982 NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH NaOH concentration/mmol/L pH 0.019 0.036 9.556 0.062 9.792 0.088 9.945 0.011 9.040 0.037 9.568 0.063 9.80 0.089 9.950 0.012 9.080 0.038 9.580 0.064 9.806 0.099 9.953 0.013 9.104 0.039 9.590 0.065 9.813 0.091 9.958 0.014 9.145 0.049 9.60 0.066 9.818 0.092 9.964 0.015 9.175 0.041 9.614 0.067 9.826 0.093 9.967 0.016 9.203 0.042 9.622 0.068 9.832 0.094 9.973 0.017 9.230 0.043 9.634 0.069 9.838 0.095 9.976 0.018 9.255 0.044 9.644 0.079 9.845 0.096 9.982 According to the table above, there is a one-to-one relationship between phenolphthalein alkalinity and pH; therefore, knowing either one of them allows one to determine the exact value of the other. Is it then not necessary to conduct further testing or analysis?
For a solution like NaOH, there is a possibility of a one-to-one relationship between phenolphthalein alkalinity and pH. I don’t think such a one-to-one relationship necessarily exists for other solutions.
I measured the alkalinity of the solution, but the result doesn’t match what I expected; it’s frustrating