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metal + kwas -> sól + H2
2Na + 2HCl------>2NaCl + H2
metal+ niemetal -> sól
2Na + Cl2----->2NaCl
tlenek metalu + kwas -> sól + woda
Na2O + 2HCl------>2NaCl + H2O
dodatkowo:
zasada + kwas---->sól + woda
NaOH + HCl----->NaCl + H2O