Sodium Hydroxide (NaOH) reacts with phosphoric acid (H3PO4) to form sodium phosphate (Na3PO4) and water (H2O) by the reaction NaOH(aq) + H3PO4 (aq) → Na3PO4 (aq) + H2O (l) if 25.60 grams of NaOH is reacted with 20.80 grams of H3PO4,

Sodium Hydroxide (NaOH) reacts with phosphoric acid (H3PO4) to form sodium phosphate (Na3PO4) and water (H2O) by the reaction NaOH(aq) + H3PO4 (aq) → Na3PO4 (aq) + H2O (l) if 25.60 grams of NaOH is reacted with 20.80 grams of H3PO4,

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter4: Molecules, Compounds, And Chemical Reactions

Section: Chapter Questions

Problem 35E: The active ingredient in aspirin is acetylsalicylic acid, which has the chemical formula C9H8O4. An...

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

1. Sodium Hydroxide (NaOH) reacts with phosphoric acid (H₃PO₄) to form sodium phosphate (Na₃PO₄) and water (H₂O) by the reaction

NaOH(aq) + H₃PO₄ (aq) → Na₃PO₄(aq) + H₂O (l)

if 25.60 grams of NaOH is reacted with 20.80 grams of H₃PO_4,

a. How many grams of Na₃PO₄ are formed?
b. What is the limiting reactant?

c. How many grams of the excess reactant remains when the reaction is complete?

2. Potassium superoxide, KO₂, is used in rebreathing masks to generate oxygen according to the reaction below. If the mask contains 0.150mol KO₂and 0.100ml mol water, how many moles of oxygen can be produced? What is the limiting reagent?
KO₂(s) + H₂O (l) → KOH (s) + O₂(g)

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