Final answer:
The product of the reaction between H₃PO₄ and Sr(OH)₂ is Sr₃(PO₄)₂ (strontium phosphate) and water, making option d the correct choice.
Step-by-step explanation:
In the partial equation H₃PO₄ + Sr(OH)₂→, we're looking to identify the product formed from the reaction between phosphoric acid (H₃PO₄) and strontium hydroxide (Sr(OH)₂). When these two react, it's a typical acid-base neutralization reaction, which usually produces water and a salt. In this case, the correct product is Sr₃(PO₄)₂, which represents strontium phosphate, a salt, along with water. So, option d. Sr₃(PO₄)₂ is the correct answer, indicating that the reaction produces strontium phosphate.