Question

name type here date type here
writing chemical formula & balancing chemical equations - slide 16
four coefficients will help balance this equation. drag the correct coefficients set / combination from the options provided below for balancing the equation and drop it in the box
$ce{so_{2} + koh -> k_{2}so_{3} + h_{2}o}$
2, 3, 2, 1
1, 2, 1, 1
2, 2, 4, 1
3, 4, 5, 1
4, 2, 2, 1
1, 1, 2, 2

Explanation:

Step1: Count atoms on each side

Reactants: S=1, O=2+1=3, K=1, H=1
Products: K=2, S=1, O=3+1=4, H=2

Step2: Balance K and H first

Add coefficient 2 to KOH: $\text{SO}_2 + 2\text{KOH}
ightarrow \text{K}_2\text{SO}_3 + \text{H}_2\text{O}$

Step3: Verify all atom counts

Reactants: S=1, O=2+2=4, K=2, H=2
Products: K=2, S=1, O=3+1=4, H=2
All atoms are balanced. Coefficients (in order of $\text{SO}_2$, KOH, $\text{K}_2\text{SO}_3$, $\text{H}_2\text{O}$) are 1,2,1,1.

Answer:

1, 2, 1, 1