1) 2HCOOH+2K=2HCOOK+H2
2) K2O+HCOOH=2HCOOK+H2O
3)KOH+HCOOH=HCOOK+H2O
4)CaCO3+2HCOOH=CO2+H2O+(HCOO)2Ca
<span>5)CH3CH2CH2OH+HCOOH=HCOOC3H7+H2O</span>
CaSIO3+HCl=CaCl2+H2SiO3
Ca(OH)2+FeCl2=CaCl2+Fe(OH)2
S+O2=SO2
H2SO3=H2O+SO2
только по 2 примера, просто больше в голову не лезет...
Дано:
m(H₂O) = 200г
V(H₂S) = 4,48л
Найти:
w(H₂S)
Решение:
Mr(H₂S) = 34
m(H₂S) =V/Vm*Mr=4,48/22,4*34 = 6,8г
w(H₂S) = 6,8/200 = 0,034*100 % = 3,4%
Ответ:
w(H₂S) = 3,4%
NaOh+hcl=nacl=h2o
kcl+agno3=kno3+agcl
mgo+h2so4=mgso4+h20
ba(oh)2+2hno3=ba(no3)2+2h2o
zno+2hbr=znbr2+h2o
3cabr2+2h3po4ca3(po4)2+6hbr
3koh+3h3po4=k3po4+3h2o
nabr+agno3=nano3+agbr