Alkalinity is typically defined as

$[Alk]=[HC{O}_3^{-}]+2[C{O}_3^{2-}]+[O{H}^{-}]-[H^{+}]$

Does the alkalinity of a natural water $($assume isolated from its surroundings, e$.$g$.$ in a beaker in

the lab$)$ increase, decrease, or stay constant upon addition of small quantities of the following:

a$)HCl$

b$)$ NaOH

c$)N{a}_{2}C{O}_3$

d$)NaHC{O}_3$

e$)C{O}_2$

f$)N{a}_{2}S{O}_4$