🤓 Based on our data, we think this question is relevant for Professor Benjamin's class at BC.

We´re asked to determine the **starting mass of KOH and H _{3}PO_{4}** based on the produced mass of K

The problem can be solved in 4 steps:

*Step 1*: Calculate the Molar Mass (MM) of KOH, H_{3}PO_{4}, and K_{3}PO_{4}.

*Step 2*: Calculate the moles of K_{3}PO_{4}, since we know the produced mass.

Potassium hydroxide and phosphoric acid react to form potassium phosphate and water according to the equation.

3KOH(aq) + H_{3}PO_{4}(aq) → K_{3}PO_{4}(aq) + 3H_{2}O(l)

Determine the starting mass of each reactant if 58.5 g of K _{3}PO_{4} is produced and 86.8 g of H_{3}PO_{4} remains unreacted.

(A) What is the starting mass of KOH? (g)

(B) What is the starting mass of H _{3}PO_{4}? (g)