#1
na2o+h2o=2naoh
2koh+co2=k2co3+h2o
co2+cao=caco3
h2sio3=sio2+h2o
cuso4+2naoh=na2so4+cu(oh)2
2hcl+2na=2nacl+h2
#2
k2o+h2o=2koh
alcl3+3koh=3kcl+al(oh)3
#1
na2o+h2o=2naoh
2koh+co2=k2co3+h2o
co2+cao=caco3
h2sio3=sio2+h2o
cuso4+2naoh=na2so4+cu(oh)2
2hcl+2na=2nacl+h2
#2
k2o+h2o=2koh
alcl3+3koh=3kcl+al(oh)3