We´re asked to determine the starting mass of KOH and H3PO4 based on the produced mass of K3PO4 and an unreacted amount of H3PO4.
The problem can be solved in 4 steps:
Step 1: Calculate the Molar Mass (MM) of KOH, H3PO4, and K3PO4.
Step 2: Calculate the moles of K3PO4, since we know the produced mass.
Potassium hydroxide and phosphoric acid react to form potassium phosphate and water according to the equation.
3KOH(aq) + H3PO4(aq) → K3PO4(aq) + 3H2O(l)
Determine the starting mass of each reactant if 58.5 g of K 3PO4 is produced and 86.8 g of H3PO4 remains unreacted.
(A) What is the starting mass of KOH? (g)
(B) What is the starting mass of H 3PO4? (g)
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Limiting Reagent concept. You can view video lessons to learn Limiting Reagent. Or if you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.
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Based on our data, we think this problem is relevant for Professor Benjamin's class at BC.