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9.h2so4+mg=mgso4+h2
h2so4+mgo=mgso4+h2o
h2so4+mg(oh)2=mgso4+2h2o
10.2na+2h2o=2naoh+h2
v(na)= 0.2mol m=4.6g
11.2zn+o2=2zno
zno+H2SO4=znso4+h2o
znso4+ba (oh)2=ZN(oh)2+baso4
12.cuso4+bacl2=cucl2+baso4
cuso4+mg=Cu+mgso4
cuso4+2koh=K2SO4+Cu(oh)2
13. 2al+3H2SO4=al2(so4)3+3h2
0.08/27=0.003mol
v(h2)=0.0045mol
0.0045*22.4=0.1l
14.2al(oh)3 =t al2o3+3H2O
al2o3+3so3=al2(so4)3
al2(so4)3+3bacl2=3baso4+2alcl3
2.г
3.б
4.б
5.в
6.б
7.б
8.б
9.h2so4+mg=mgso4+h2
h2so4+mgo=mgso4+h2o
h2so4+mg(oh)2=mgso4+2h2o
10.2na+2h2o=2naoh+h2
v(na)= 0.2mol m=4.6g
11.2zn+o2=2zno
zno+H2SO4=znso4+h2o
znso4+ba (oh)2=ZN(oh)2+baso4
12.cuso4+bacl2=cucl2+baso4
cuso4+mg=Cu+mgso4
cuso4+2koh=K2SO4+Cu(oh)2
13. 2al+3H2SO4=al2(so4)3+3h2
0.08/27=0.003mol
v(h2)=0.0045mol
0.0045*22.4=0.1l
14.2al(oh)3 =t al2o3+3H2O
al2o3+3so3=al2(so4)3
al2(so4)3+3bacl2=3baso4+2alcl3