Write the reaction equations: barium-barium hydroxide-barium carbonate-barium nitrate-barium sulfate

Let’s write the equations:
Ba + 2H2O = Ba (OH) 2 + H2 – ОВР;
Ba (OH) 2 + CO2 = BaCO3 + H2O – ion exchange, obtained insoluble barium carbonate salt;
BaCO3 + 2HNO3 = Ba (NO3) 2 + H2O + CO2 – ion exchange, barium nitrate is formed, the resulting carbonic acid is not stable;
Ba (NO3) 2 + K2SO4 = BaSO4 + 2KNO3 – ion exchange, obtained barium sulfate, insoluble salt.
Barium salts are poisonous; barium sulfate is of practical importance. BaSO4 is used in medicine, in radiology. The equations confirm the genetic relationship of metals, hydroxides, salts.