ex 5 va rog rezolvare
Răspunsuri la întrebare
Răspuns:
Explicație:
1.
a. A
b. A
c.A
d. A
2.
a. --------------------compuse --------------------------hidroxil----------------metalului
b. M ( OH)n n= 1,2,3,4,5
c. -------------------solubile si baze insolubile
d. -------------------inrosesc fenolftaleina si albastresc turnesolul
3.
Baze solubile : NaOH ,KOH
Baze insolubile : Ca(OH)2 , Fe(OH)3 , Zn(OH)2
4.
a. Mg(OH)2
b.Fe(OH)2
c. Fe(OH)3
d. Al(OH)3
5.
2Na + 2H2O=2NaOH +H2 a= Na
b=NaOH
2NaOH + FeCl3= 3NaCl + Fe(OH)3 e= Fe(OH3
2NaCl + 2H2O=2Na OH + H2 +Cl2
2NaOH + CuSO4= Na2SO4 + Cu(OH)2 c=Cu(OH)2
d= Na2SO4
baze : NaOH , Cu(OH)2 , Fe(OH)3 ,
comp. proc. a Fe(OH)3
M= 56 + 3.16 +3=107----> 107g/moli
107g Fe(OH)3-------------56gFe---------48gO-------3gH
100g-------------------------------x-------------y-------------z
x=100.56:107=52,34%Fe
y=100.32:107=29,91% O
z=100.2:107=1,87% H
7.
2K + H2SO4=K2SO4 +H2
4K + O2=2K2O
K2O + H2SO4= K2SO4 + H2O