Question

use the equation to answer the question

naoh + feso₄ → na₂so₄ + fe(oh)₂

which option shows the correctly balanced chemical equation?

(1 point)

○ 2naoh + feso4 → na2so4 + fe(oh)2

○ 2naoh + 2feso4 → 2na2so4 + fe(oh)2

○ 2naoh + 2feso4 → na2so4 + fe(oh)2

○ naoh + feso4 → na2so4 + fe(oh)2

check answer remaining attempts 3

Explanation:

Step1: Count atoms on both sides

Original equation: \(NaOH + FeSO_4 \to Na_2SO_4+Fe(OH)_2\)

• Na: 1 (left) vs 2 (right)
• O: \(1 + 4=5\) (left, from \(NaOH\) and \(FeSO_4\)) vs \(4 + 2 = 6\) (right, from \(Na_2SO_4\) and \(Fe(OH)_2\))
• H: 1 (left) vs 2 (right)
• Fe: 1 (left) vs 1 (right)
• S: 1 (left) vs 1 (right)

Step2: Balance Na and H

Put a coefficient of 2 in front of \(NaOH\)
New equation: \(2NaOH + FeSO_4 \to Na_2SO_4+Fe(OH)_2\)

• Na: \(2\times1 = 2\) (left) vs 2 (right)
• O: \((2\times1)+4=6\) (left, from \(2NaOH\) and \(FeSO_4\)) vs \(4 + 2 = 6\) (right, from \(Na_2SO_4\) and \(Fe(OH)_2\))
• H: \(2\times1 = 2\) (left) vs 2 (right)
• Fe: 1 (left) vs 1 (right)
• S: 1 (left) vs 1 (right)

Answer:

\(2NaOH + FeSO_4 \to Na_2SO_4+Fe(OH)_2\) (the first option)