1)+met
cu + 4hno3(conc) = cu(no3)2 + 2no2 + 2h2o
2)+basic oxide
mgo + 2hno3(conc) = mgno3 + h2o
3)+non-metall
p + hno3(conc) = h3po4 + no2 + h2o (i dont want to write coefficients^)
4)+acidic oxide(reductant)
p2o3 + hno3(conc) = h3po4 + no2 + h2o (again, not write coefficients)
5)+basic, alkali for example
naoh + hno3 = nano3 + h2o
6)+acid (reductant)
h2s + hno3 = h2so4 + no2 + h2o ( again, not write coefficients)
7)+salt(reductant, cause all nitrates are soluble in water)
k2s + hno3 = k2so4 + h2o + no2 ( again, not write coefficients)
for 5-9 class it's quite^)
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