Need this question answered ASAP, thank you :) Phosphoric acid, H3PO4, has some

Question

Need this question answered ASAP, thank you :)

Phosphoric acid, H3PO4, has some important applications. It can be used to produce fertilizers and it is present in cola drinks. Phosphoric acid can be made from phosphorus in a two-step process:

Reaction 1: P4 + 5 O2------> P4O10

Reaction 2: P4O10 + 6H2O-----> 4 H3PO4

1. What is the molar mass of phosphoric acid, H3PO4?

2. How many moles of phosphoric acid can be produced from 1 mole of P4?

3. A systhesis yielded 102 g of phosphoric acid.

How many moles of phosphoric acid were produced?

4. How many moles of P4 would be required to produce the moles of phosphoric acid determined in question 3?

5. Convert the moles of P4 determined in question 4 into grams (which tells us the grams of P4 that actually reacted).

6. Let's say that the experimentalist actually used 175g taken from a bottle labelled P4. Based upon your answer to question 5 you can see that it did not all react. We will assume this was because the reagent in this bottle cnotained inert impurities. So, based upon your answer to question 5 and the grams of chemisical taken from the reagent bottle, what was the actual mass percent P4 in the bottle?

Explanation / Answer

(1) Molar mass of Phosphoric acid = 3(1) + 31 + 4(16) = 98 g/mol

(2) 1 mol of P4 can produce 4 moles of Phosphoric acid

(3) n = 102/98 = 1.041 moles of Phosphoric acid is produced

(4) No.of moles of P4 = 1.041/4 = 0.26025 mol

(5) Mass of P4 = 0.26025 X 4(31) = 32.271 g.

(6) Mass % of P4 = (32.271 /175 ) x 100 = 18.44 %

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.