Question

A solution of calcium fluoride is mixed with a solution of potassium phosphate. Balance the equation by adding the missing coefficients:

Answer 1

The chemical equation between calcium fluoride and potassium phosphate, producing water and calcium phosphate, is balanced by using coefficients to ensure an equal number of atoms for each element on both sides. The correct balanced equation is: 2 H₂PO₄ (aq) + 3 Ca(OH)₂ (aq) → 6 H₂O(l) + Ca₃ (PO₄)₂ (s).

Step-by-step explanation:

The student's question relates to balancing chemical equations, which involves adding appropriate coefficients to the reactants and products in a chemical reaction to ensure that the number of atoms for each element is the same on both sides of the equation. In the example provided, we are dealing with a reaction between a solution of calcium fluoride and potassium phosphate. Since the expected products are water and calcium phosphate, the initial chemical equation is H₂PO₄ (aq) + Ca(OH)₂ (aq) → H₂O(l) + Ca₃ (PO₄)₂ (s). To balance this equation, we recognize that Ca₃(PO4)2 is insoluble and has a (s) phase label. We need two phosphate ions and three calcium ions to balance the equation properly. The corrected balanced chemical equation is:

2 H₂PO₄ (aq) + 3 Ca(OH)₂ (aq) → 6 H₂O(l) + Ca₃ (PO₄)₂ (s)

Answer 2

The question involves balancing a chemical reaction equation between calcium fluoride and potassium phosphate, aiming to form calcium phosphate and potassium fluoride.

Step-by-step explanation:

The subject of this question is a chemical reaction that occurs when a solution of calcium fluoride is mixed with a solution of potassium phosphate. The goal is to balance the chemical equation by adding the correct coefficients to the reactants and products.

It appears there may be some confusion in the given information, as calcium fluoride (CaF2) and potassium phosphate (
K3PO4) are involved, not calcium hydroxide (Ca(OH)2) and phosphoric acid (H2PO4). Nonetheless, in this scenario, we would expect to form calcium phosphate (Ca3(PO4)2), which is insoluble, and potassium fluoride (KF), which is soluble. The actual balanced equation would be:

3 CaF2 (s) + 2 K3PO4 (aq) → Ca3(PO4)2 (s) + 6 KF (aq)

Here, the equation has been balanced by ensuring there are the same numbers of each type of atom on both sides of the equation.