Question

Which chemical equation is balanced?

A. K2O + H2O -> KOH
B. K2O + H2O -> 2KOH
C. K2O + 2H2O -> 2KOH
D. 2K2O + 2H2O -> 2KOH

Answer 1

B. K2O + H2O -> 2KOH

Step-by-step explanation

for the first one:

left side right side

kk k

oo o

hh h

for the second one:

left side right side

kk kk

oo oo

hh hh

for the third one:

left side right side

kk kk

ooo oo

hhhh hh

for the fourth one:

left side right side

kkkk kk

oooo oo

hhhh hh

Answer 2

C) K20 + 2H2O -> 2KOH