Question

Mohon bantuannya.
setarakan persamaan reaksi dibawah ini.
a.Cl2 + KOH => KCl + KClO3 + H2O
b.Na2SbS4 + HCl => NaCl + Sb2S3 + H2S + Cl2
c.K2Cr2O7 + H2SO4 => K2SO4 + Cr2(SO4)3 + H2O + O2
klo bisa dengan caranya..trimakasih.

Answer 1

A.3Cl2 + 6KOH => 5KCl + KClO3 + 3H2O
b.2Na2SbS4 + 10HCl => 4NaCl + Sb2S3 + 5H2S + 3Cl2
c.2K2Cr2O7 + 8H2SO4 => 2K2SO4 + 2Cr2(SO4)3 + 8H2O + 3O2

Answer 2

a. 3 Cl2 + 6 KOH => 5 KCl + KClO3 + 3 H2O

b. 2 Na2SbS4 + 10 HCl => 4 NaCl + Sb2S3 + 5 H2S + 3 Cl2

c. 2 K2Cr2O7 + 8 H2SO4 => 2 K2SO4 + 2 Cr2(SO4)3 + 8 H2O + 3 O2

cara : contoh c
 a K2Cr2O7 + b H2SO4 => c K2SO4 + d Cr2(SO4)3 + e H2O + f O2
K => 2a = 2c
Cr => 2a = 2d
O => 7a + 4b = 4c + 12d + e + 2f
H => 2b = 2e
S => b = c + 3d
jika a = 1 , c=1
2a = 2d
d = a = 1
b = c + 3d
b = 1 + 3(1) = 4
2b = 2e
2(4) = 2e
e = 4
7a + 4b = 4c + 12d + e + 2f
7(1) + 4(4) = 4(1) + 12(1) + 4 + 2f
2f = 23 - 20
2f = 3
f = 3/2
didapat :
a=1,b=4,c=1,d=1,e=4,f=3/2   dikalikan 2
a=2 , b=8 , c = 2 , d = 2 , e = 8 , f =3
2 K2Cr2O7 + 8 H2SO4 => 2 K2SO4 + 2 Cr2(SO4)3 + 8 H2O + 3 O2