Write the balanced equation for the reaction of H3PO4 with Ba(OH)2. You can show this on your work page.

Question

Write the balanced equation for the reaction of H3PO4 with Ba(OH)2.  You can show this on your work page.

BlackTom AI · Accepted Answer

The question asks for the balanced chemical equation for the reaction between phosphoric acid and barium hydroxide.

Option availability: There are no provided answer choices to analyze, so I will verify the given solution for correctness and show the balancing reasoning that would apply to any multiple-choice option set.

Step-by-step balancing rationale:
- Identify reactants and products: H3PO4 (aq) is an acid, Ba(OH)2 (aq) is a base, and the neutralization yields a salt Ba3(PO4)2(s) plus water (H2O(l)).
- Write the unbalanced skeleton equation: H3PO4 + Ba(OH)2 → Ba3(PO4)2 + H2O. To balance, we need to determine coefficients that satisfy all elements on both sides.
- Balance barium (Ba) first: The product contains Ba3 in Ba3(PO4)2, so we need 3 Ba on the left. This requires 3 Ba(OH)2 molecules: 3 Ba(OH)2.
  Now the equation is: H3PO4 + 3 Ba(OH)2 → Ba3(PO4)2 + H2O.
- Balance phosphate groups and phosphorus (P): Ba3(PO4)2 contains 2 PO4 units, so we need 2 H3PO4 molecules to supply 2 phosphorus atoms and 2 phosphate groups: 2 H3PO4 + 3 Ba(OH)2 → Ba3(PO4)2 + H2O.
- Balance hydrogen (H): Left side now has 2×3 = 6 H from H3PO4 and 3×2 = 6 H from Ba(OH)2, totaling 12 H. Right side has 6 H2O molecules contributing 12 H, which matches if we have 6 H2O. So add 6 H2O on the product side: 2 H3PO4 + 3 Ba(OH)2 → Ba3(PO4)2 + 6 H2O.
- Balance oxygen (O): Check left: H3PO4 has 4 O per molecule × 2 = 8 O; Ba(OH)2 has 2 O per molecule × 3 = 6 O; total 14 O. Right: Ba3(PO4)2 has 8 O (4 per PO4 × 2), plus 6 H2O has 6 O, totaling 14 O. Oxygen balance is satisfied.
- Final balanced equation confirmed: 2 H3PO4(aq) + 3 Ba(OH)2(aq) → Ba3(PO4)2(s) + 6 H2O(l).

Why an incorrect option (if present) might be wrong (general guidance):
- If a choice alike to 1 H3PO4 + 1 Ba(OH)2 appears, it would violate Ba count and/or H and O balance.
- A choice that omits water formation or misplaces the precipitate would fail mass balance checks.
- A neutralization that yields a soluble salt instead of a sparingly soluble Ba3(PO4)2 would contradict the observed precipitation in this reaction class.

In summary, the provided balanced equation correctly satisfies conservation of mass for Ba, P, H, and O, and reflects the formation of solid Ba3(PO4)2 with liquid water as products.

Write the balanced equation for the reaction of H3PO4 with Ba(OH)2. You can show this on your work page.

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Write the balanced equation for the reaction of H3PO4 with Ba(OH)2. You can show this on your work page.

View Explanation

Log in for full answers

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What is the coefficient for NaOH(aq) when the following equation is balanced? B2O3(s) + NaOH(aq) → Na3BO3(aq) + H2O(l)

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