Do my calculation has problem?
(See your result
Total Alkalinity = 8.49 ÷ 25/1000 = 340 mg/L)
Red = wrong Why I cannot calculate the phenolphthalein alkalinity ? Please *delete me*
Yes, You did it. Your calculations were to phenolphthalein alkalinity (P alkalinity)
The phenolphthalein alkalinity (P alkalinity) Value is ~ 339,3 mg CaCO3/LFor Total Alkalinity you must to do the same calculation, using the Total Volume (including the volume of acid used for your 1st end-point). V=27.50 mL
The Total alkalinity (MO alkalinity) Value is ~ 1111 mg CaCO3/L