## Acid reactions
1. acid + metal (exc. Cu, Hg, Ag) $\longrightarrow$ salt + $H_{2(g)}$
-2. acid + metal carbonate $\longrightarrow$ salt + $CO_{2(g)} + H_2O _{(l)}$
+2. acid + metal carbonate $\longrightarrow$ salt + $CO_{2(g)} + H_2O_{(l)}$
3. acid + metal hydrogen carbonate $\longrightarrow$ salt + $CO_{2(g)} + H_2O_{(l)}$
4. acid + metal sulfite $\longrightarrow$ salt + $SO_{2(g)} + H_2O_{(l)}$
5. acid + metal sulfide $\longrightarrow$ salt + $H_2S_{(g)}$
## Bronsted-Lowry theory
-> **Acid:** donates a proton ($H^+$ ion)
+> **Acid:** donates a proton ($H^+$ ion) r
> **Base:** accepts a proton from another substance
H atom is one proton and electron, so removing an electron leaves $H^+$ ion.