Question

Sub5 repedee va rogg

Answer 1

Răspuns:

2

NaOH +  HCl → NaCl + H2O

2H2O - curent electric→ 2H2↑ + O2↑

NaCl + H2SO4→ Na2SO4 + 2HCl

IV.

a)  2NaOH + NiCl2  → Ni(OH)2 + 2NaCl

b) BaCO3 + 2NaCl→ BaCl2 + Na2CO3

V.

2moli...........1mol

2NaOH + H2SO4→ Na2SO4 +Na2SO4 + 2H2O

3moli..........xmoli

x=3x1/2=1,5moli H2SO4

MH2SO4=2x1+32+4x16=98g/mol

n=m/M

m=nxM=147g

Explicație:

a= NaOH

c= NaCl

d= H2O