Question

Upon balancing the equation below, how many moles of sulfuric acid are needed to react completely with 6.4 moles of lithium hydroxide?
LiOH + H2SO4yields Li2SO4 + H2O (2 points)
Group of answer choices
12.8 mol H2SO4
6.4 mol H2SO4
3.2 mol H2SO4
2.1 mol H2SO4

Answer 1

Moles of Sulfuric acid needed to react completely : 3.2

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction (balanced)

H₂SO₄ (aq) + 2 LiOH (aq) ⇒ Li₂SO₄ (aq) + 2 H₂O (l)

moles of LiOH = 6.4

From equation, mol ratio of H₂SO₄ : LiOH = 1 : 2, so mol H₂SO₄ :

$\tt mol=\dfrac{1}{2}\times 6.4=3.2$