This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
To determine which chemical equation is balanced, we need to count the number of atoms for each element on both the reactant and product sides of each equation. A balanced equation has an equal number of atoms of each element on both sides. Let's analyze each option: A) 2Ca(OH)_2 + 3H_2SO_4 → CaSO_4 + 4H_2O Reactants: Ca: 2 × 1 = 2 O: (2 × 2) + (3 × 4) = 4 + 12 = 16 H: (2 × 2) + (3 × 2) = 4 + 6 = 10 S: 3 × 1 = 3 Products: Ca: 1 × 1 = 1 O: (1 × 4) + (4 × 1) = 4 + 4 = 8 H: 4 × 2 = 8 S: 1 × 1 = 1 This equation is not balanced (e.g., Ca: 2 vs 1). B) Ca(OH)_2 + 2H_2SO_4 → Ca(HSO_4)_2 + 4H_2O Reactants: Ca: 1 × 1 = 1 O: (1 × 2) + (2 × 4) = 2 + 8 = 10 H: (1 × 2) + (2 × 2) = 2 + 4 = 6 S: 2 × 1 = 2 Products: Ca: 1 × 1 = 1 O: (2 × 4) + (4 × 1) = 8 + 4 = 12 H: (2 × 1) + (4 × 2) = 2 + 8 = 10 S: 2 × 1 = 2 This equation is not balanced (e.g., O: 10 vs 12). C) 2Ca(OH)_2 + H_2SO_4 → 2CaSO_4 + 2H_2O Reactants: Ca: 2 × 1 = 2 O: (2 × 2) + (1 × 4) = 4 + 4 = 8 H: (2 × 2) + (1 × 2) = 4 + 2 = 6 S: 1 × 1 = 1 Products: Ca: 2 × 1 = 2 O: (2 × 4) + (2 × 1) = 8 + 2 = 10 H: 2 × 2 = 4 S: 2 × 1 = 2 This equation is not balanced (e.g., O: 8 vs 10). D) Ca(OH)_2 + H_2SO_4 → CaSO_4 + 2H_2O Reactants: Ca: 1 × 1 = 1 O: (1 × 2) + (1 × 4) = 2 + 4 = 6 H: (1 × 2) + (1 × 2) = 2 + 2 = 4 S: 1 × 1 = 1 Products: Ca: 1 × 1 = 1 O: (1 × 4) + (2 × 1) = 4 + 2 = 6 H: 2 × 2 = 4 S: 1 × 1 = 1 This equation is balanced. All atoms are equal on both sides. The correct option is D. Last free one today — make it count tomorrow, or type /upgrade for unlimited.