Skip to main content
Ch.3 - Chemical Reactions and Reaction Stoichiometry
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 15th EditionCh.3 - Chemical Reactions and Reaction StoichiometryProblema 75b
Capitolo 3, Problema 75b

Consider the mixture of ethanol, C2H5OH, and O2 shown in the accompanying diagram. (b) Which reactant is the limiting reactant?

Guida verificata passo dopo passo
1
Identify the balanced chemical equation for the combustion of ethanol. The equation is: C2H5OH + 3 O2 → 2 CO2 + 3 H2O.
Determine the molar ratio between ethanol and oxygen from the balanced equation. For every 1 mole of ethanol, 3 moles of oxygen are required.
Calculate the moles of each reactant present in the mixture using their given quantities and molar masses. Ethanol has a molar mass of 46.07 g/mol, and oxygen has a molar mass of 32.00 g/mol for O2.
Compare the actual mole ratio of ethanol to oxygen in the mixture to the stoichiometric mole ratio from the balanced equation.
The limiting reactant is the one that is present in less than the required stoichiometric amount compared to the other reactant. Determine which reactant runs out first based on the calculated mole ratios.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Limiting Reactant

The limiting reactant is the substance that is completely consumed first in a chemical reaction, thus determining the maximum amount of product that can be formed. In a reaction, if one reactant is present in a lesser amount than required by the stoichiometric ratios, it limits the extent of the reaction, leading to incomplete conversion of other reactants.
Video consigliato:
Percorso guidato
01:30
Limiting Reagent Concept

Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced chemical equation. It involves using mole ratios derived from the coefficients of the balanced equation to determine how much of each reactant is needed or how much product can be formed, which is essential for identifying the limiting reactant.
Video consigliato:
Percorso guidato
01:16
Stoichiometry Concept

Molar Ratios

Molar ratios are the ratios of the amounts of reactants and products in a balanced chemical equation, expressed in moles. These ratios are crucial for determining how much of each reactant is required for a reaction and for identifying which reactant will be consumed first, thus establishing the limiting reactant in the process.
Video consigliato:
Percorso guidato
02:14
Neutron-Proton Ratio
Pratica correlata
Domanda del libro di testo

Detonation of nitroglycerin proceeds as follows: 4 C3H5N3O91l2¡ 12 CO21g2 + 6 N21g2 + O21g2 + 10 H2O1g2 (a) If a sample containing 2.00 mL of nitroglycerin 1density = 1.592 g>mL2 is detonated, how many moles of gas are produced?

1208
views
1
rank
Domanda del libro di testo

Consider the mixture of propane, C3H8, and O2 shown here. (c) How many molecules of CO2, H2O, C3H8, and O2 will be present if the reaction goes to completion?

954
views
Domanda del libro di testo

The combustion of one mole of liquid octane, CH3(CH2)6CH3, produces 5470 kJ of heat. Calculate how much heat is produced if 1.000 gallon of octane is combusted.

2565
views
Domanda del libro di testo

Consider the mixture of propane, C3H8, and O2 shown here. (a) Write a balanced equation for the combustion reaction that occurs between propane and oxygen.

626
views
Domanda del libro di testo

Consider the mixture of ethanol, C2H5OH, and O2 shown in the accompanying diagram. (c) How many molecules of CO2, H2O, C2H5OH, and O2 will be present if the reaction goes to completion?

690
views