Question

Balance the following equation. Choose "blank" if no coefficient other than 1 is needed.

K + H20 H2 + KOH

Answer 1

\[\large\rm K +H_2O \rightarrow KOH +H_2\]
is it correct ?

Answer 2

they are asking for the numbers you would plug in

Answer 3

yes right. I am asking that equation i typed is the same as yours ? just want to make sure

Answer 4

okay

Answer 5

\[\large\rm K +H_2O \rightarrow KOH +H_2\]
`Left side: `
K: 1
H:2
O:1

`Right Side:`
K: 1
H:3
O:1

Writing down the number of atoms on each side of the arrow will be helpful to balance the equation

The number of potassium atom is same on both sides same with oxygen. But we need one more hydrogen to the left side
we can change coefficient but we cannot change the subscript. Therefore, we need to start by adding 2 more atom of hydrogen
\[\large\rm K +\color{red}{2} H_2O \rightarrow KOH +H_2\]
After adding 2 hydrogen atom the number of hydrogen and oxygen are different now
`Left side: `
K: 1
H: 4
O:2

`Right Side:`
K: 1
H:3
O:1
now we have 2 moles of oxygen to the left but only on the right hand side
any Idea where we should coefficient to get 2 moles of oxygen on right hand side ?

Answer 6

only one **