a) Na--NaOH--NaNO3
1)2Na+2H2O=H2+2NaOH
2)NaOH+HNO3=NaNO3+H2O
б)K--KOH--K2CO3
1)2K+2H2O=H2+2KOH
2)2KOH+CO2=H2O+K2CO3
в)Cu--CuO--CuCl2--Cu(OH)2--CuO
1)2Cu+O2=2CuO
2)CuO+2HCl=H2O+CuCl2
3)CuCl2+2KOH=2KCl+Cu(OH)2
4)Cu(OH)2=CuO+H2O
г)Ca--CaO--Ca(OH)2--CaCl2
1)2Ca+O2=2CaO
2)CaO+H2O=Ca(OH)2
3)Ca(OH)2+2HCl=CaCl2+2H2O
д)Zn--ZnO--Zn(NO3)2--Zn(OH)2--ZnSO4
1)2Zn+O2=2ZnO
2)ZnO+2HNO3=Zn(NO3)2+H2O
3)Zn(NO3)2+2KOH=2KNO3+Zn(OH)2
4)Zn(OH)2+H2SO4=2H2O+ZnSO4
e)Ba--Ba(OH)2-- Ba(CH3COO)2
1)Ba+2H2O=H2+Ba(OH)2
2)Ba(OH)2+2CH3COOH=Ba(CH3COO)2+2H2O
№1P2O5 P=31*2=62, O=16*5=80
80+62=142
142100%
80x
x=(80*100)/142=56,3%(O)
100-56,3...=43.66 т.е.44%(P)
ответ:P=43,66%
O=56,3%
№2 HNO3 H=1, N=14,O=16*3=48
1+14+48=63
63100%
1x
x=(100*1)/63=1,58% т.е. 1,6%(H)
63-1=62
100%-1,58...=98,41%
6298,41%
14x
x=(14*98,41)/62=22,22%(N)
98,41-22,22=76,19%(O)
ответ:H=1,6% или 1,58%
N=22,22%
O=76,19%
№3 AsH3 As=75, H=1*3=3
75+3=78
78100%
75x
x=(75*100)/78=96,15%
100-96,15...=3,84%
ответ:As=96,15%
H=3,84%
a) Na--NaOH--NaNO3
1)2Na+2H2O=H2+2NaOH
2)NaOH+HNO3=NaNO3+H2O
б)K--KOH--K2CO3
1)2K+2H2O=H2+2KOH
2)2KOH+CO2=H2O+K2CO3
в)Cu--CuO--CuCl2--Cu(OH)2--CuO
1)2Cu+O2=2CuO
2)CuO+2HCl=H2O+CuCl2
3)CuCl2+2KOH=2KCl+Cu(OH)2
4)Cu(OH)2=CuO+H2O
г)Ca--CaO--Ca(OH)2--CaCl2
1)2Ca+O2=2CaO
2)CaO+H2O=Ca(OH)2
3)Ca(OH)2+2HCl=CaCl2+2H2O
д)Zn--ZnO--Zn(NO3)2--Zn(OH)2--ZnSO4
1)2Zn+O2=2ZnO
2)ZnO+2HNO3=Zn(NO3)2+H2O
3)Zn(NO3)2+2KOH=2KNO3+Zn(OH)2
4)Zn(OH)2+H2SO4=2H2O+ZnSO4
e)Ba--Ba(OH)2-- Ba(CH3COO)2
1)Ba+2H2O=H2+Ba(OH)2
2)Ba(OH)2+2CH3COOH=Ba(CH3COO)2+2H2O
№1P2O5 P=31*2=62, O=16*5=80
80+62=142
142100%
80x
x=(80*100)/142=56,3%(O)
100-56,3...=43.66 т.е.44%(P)
ответ:P=43,66%
O=56,3%
№2 HNO3 H=1, N=14,O=16*3=48
1+14+48=63
63100%
1x
x=(100*1)/63=1,58% т.е. 1,6%(H)
63-1=62
100%-1,58...=98,41%
6298,41%
14x
x=(14*98,41)/62=22,22%(N)
98,41-22,22=76,19%(O)
ответ:H=1,6% или 1,58%
N=22,22%
O=76,19%
№3 AsH3 As=75, H=1*3=3
75+3=78
78100%
75x
x=(75*100)/78=96,15%
100-96,15...=3,84%
ответ:As=96,15%
H=3,84%