1.Estimate the alkalinity, expressed as mg/L of CaCO3, of the following sample (Ca+2 = \begin{array}{l} \text { 190.2; } \mathrm{Mg}^{+2}=84.1 ; \mathrm{Na}^{+}=75.2, \mathrm{~K}^{+}=5.1 ; \mathrm{Fe}^{+2}=0.2 ; \mathrm{HCO}_{3}^{-}=260 ; \mathrm{SO}_{4}^{2}=64 ;

\mathrm{Cl}^{-}= \\ \text {440.4; } \left.\mathrm{NO}_{3}^{-}=35.1 ; \mathrm{CO}_{3}^{2}=30 \mathrm{mg} / \mathrm{L}\right) \end{array}